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City of Aspen/ Pitkin County Energy Conservation Code
Chapter 8.20 BUILDING CODE
The 1999 Aspen/Pitkin Energy Conservation Code adopted and incorporated by reference as Appendix Chapter 13, Section 1302.2, to the Uniform Building Code, 1999 Edition, as codified is amended as follows:
CHAPTER 1 ADMINISTRATION
SECTION 101 - TITLE, PURPOSE, AND SCOPE
101.1 Title. These regulations shall be known as the 1999 Aspen/Pitkin Energy Conservation Code, may be cited as such and will be referred to herein as "this Code".
101.2 Purpose. The purpose of this code is to provide minimum standards for the conservation of energy obtained from depletable sources by regulating and controlling the design, construction, quality of materials, location and maintenance of all buildings and structures within this jurisdiction and certain equipment specifically regulated herein.
101.3 Scope. The provisions of this code shall apply to all buildings for which an application for a building permit or renewal of an existing permit is filed or is required by law to be filed; and, that are either directly or indirectly conditioned by mechanical heating or mechanical cooling.
EXCEPTION: Qualified "Historic Buildings" as defined in Chapter 2, Section 209 of this Code.
SECTION 107 - FEES
The APECC review and compliance fee shall be 10% of the associated permit fee. The minimum review and compliance fee for building permits shall be $20.00.
Exception: Structures that comply with the Aspen Pitkin Green Program, shall have a 50% reduction in APECC energy permit fee.
SECTION 108 -- INSPECTIONS
See Section 108 of the 1997 UBC
108.1 Energy Conservation Code inspections. The Building Division shall inspect new construction to determine whether it is consistent with approved plans and specifications, and complies with this code. Certificates of Occupancy shall not be issued until such consistency is verified.
SECTION 110 - CALCULATION METHODS AND ALTERNATE COMPONENT PACKAGES
110.1 Public Domain Computer Program. In addition to the present approved public domain computer programs, the Chief Building Official may, upon written application or his/her own motion, approve additional public domain computer programs that may be used to demonstrate that the proposed building designs meet the requirements of this code.
The Chief Building Official shall ensure that user's manuals or guides for each approved program are available.
SECTION 111 - CERTIFICATION OF ENERGY PROFESSIONALS
111.1 Certification. Certification for designers, licensed contractors ·and superintendents will be available through seminars and testing approved by the Chief Building Official. As an alternate an E-Star TM rated Design Professional Certification shall be acceptable.
111.1.1 The design professional test will deal with designing for compliance and documenting compliance. Once the design professional has passed the test he/she will be Certified Energy Design Professional by the Chief Building Official.
Certified Energy Design Professionals will be entitled to submit Certified Documentation of Compliance with a building permit application. Certification will exempt that application from detailed review except for random audits.
Certification will be revoked if the design professional shows disregard of the regulations or if they certify documents that do not comply.
111.1.2 The licensed contractor or superintendent test will deal with building structures to maintain compliance. Once the licensed contractor or superintendent has passed the test he/she will be Certified Energy Building Professional by the Chief Building Official, as an alternate an E-Star TM rated Builder shall be acceptable.
Certified Energy Building Professionals will be entitled to certify compliance for structures they build. Certification will exempt those structures from detailed inspections for energy code compliance except for random audits.
Certification will be revoked if the Certified Energy Building Professionals show disregard of the regulations or if they certify structures that do not comply.
CHAPTER 2 DEFINITIONS AND ABBREVIATIONS
SECTION 202 -
A ACCESSIBLE is having access thereto, but which first may require removal or opening of access panels, doors, or similar obstructions.
ADDITION is any change to a building that increases conditioned floor area and/or conditioned volume.
ALTERATION is any change to a building's water heating system, space conditioning system, or envelope that is not an addition.
ALTERNATIVE CALCULATION METHODS (ACMs) are the City of Aspen/Pitkin County Energy Code Public Domain Computer Programs, one of the City of Aspen/Pitkin County Energy Code Simplified Calculation Methods, or any other calculation method approved by the Chief Building Official.
APCDD is the Aspen/Pitkin Community Development Department.
APPLIANCE EFFICIENCY REGULATIONS is NAECA.
APPROVED BY THE CHIEF BUILDING OFFICIAL means approval under Uniform Building Code.
APPROVED CALCULATION METHOD (See ALTERNATIVE CALCULATION METHODS).
ASPEN PITKIN GREEN PROGRAM is a guide to the green construction of homes and subdivisions, compiled by the National Association of Home Builders, ERHC, as amended and published by the Aspen/Pitkin Community Development Department Building Division
SECTION 203 - B
BUILDING ENVELOPE is the ensemble of exterior and demising partitions of a building that enclose conditioned space.
SECTION 204 - C
CLIMATE ZONE is the geographic areas of Pitkin County for which the Aspen/Pitkin Regional Building Division has jurisdiction.
COMPLIANCE APPROACH means any one of the allowable methods by which design and construction of a building may be demonstrated to be in compliance with Chapter 3.
CONDITIONED FLOOR AREA (CFA) is the floor area (in square feet) of enclosed conditioned space on all floors of a building, as measured at the floor level of the exterior surfaces of exterior walls enclosing the conditioned space.
CONDITIONED SPACE is space in a building that is either directly conditioned or indirectly conditioned.
CONDITIONED VOLUME is the total volume (in cubic feet) of the conditioned space within a building.
COVERED PRODUCT is an appliance regulated by the efficiency standards established under the National Appliance Energy Conservation Act (NAECA), 42 U.S.C. Section 6291 of 1987.
CRAWL SPACE is an unfinished space immediately under the first floor of a building adjacent to grade less than 5?6? in height.
SECTION 205 - D
DECORATIVE GAS APPLIANCE is a gas appliance that is designed or installed for visual effect only, cannot burn solid wood, and simulates a fire in a fireplace.
DEGREE DAY, HEATING is a unit, based upon temperature difference and time, used in estimating fuel consumption and specifying nominal annual heating load of a building. For any one day, when the mean temperature is less than 65?F, there exist, as many degree days as there are Fahrenheit degrees difference in temperature between the mean temperature for the day and 65?F. The number of degree days for use with this code is 8,850.
DEMISING PARTITIONS AND WALLS are bafflers that separate conditioned space from enclosed unconditioned space.
DESIGN CONDITIONS are the parameters and conditions used to determine the performance requirements of space conditioning systems. Design conditions for determining design heating and cooling loads are specified in Section 305.1.7.2.
DESIGN HEAT LOSS RATE is the total calculated heat loss through the building envelope under design conditions.
SECTION 206 - E
ENCLOSED SPACE is space that is substantially surrounded by solid surfaces.
ENERGY BUDGET is the maximum amount of source energy that a proposed building, or portion of a building, can be designed to consume, calculated with the approved procedures specified in Chapter 3.
ENERGY CONSERVATION STANDARDS means City of Aspen/Pitkin County Energy Conservation Code, Chapter 3.
ENERGY OBTAINED FROM DEPLETABLE SOURCES is electricity purchased from a public utility, or any energy obtained from coal, oil, natural gas, or liquefied petroleum gases.
ENERGY OBTAINED FROM NONDEPLETABLE SOURCES is energy that is not energy obtained from depletable sources.
ENFORCING AGENCY is the Aspen/Pitkin County Community Development Department, Building Division.
ENTIRE BUILDING is the ensemble of all enclosed space in a building, including the space for which a permit is sought, plus all existing conditioned and unconditioned space within the structure.
ENVELOPE means building envelope
ERHC E-STAR TM A program provided through Energy Rated Homes of Colorado which rates the energy efficiency of a structure.
EXFILTRATION is uncontrolled outward air leakage from inside a building, including leakage through cracks and interstices, around windows and doors, and through any other exterior partition or duct penetration.
EXISTING BUILDING is a building constructed prior to the adoption of the Aspen/Pitkin Energy Conservation Code dated February 12, 1996.
EXPOSED THERMAL MASS is mass that is directly exposed (uncovered) to the conditioned space of the building.
EXTERIOR FLOOR/SOFFIT is a horizontal exterior partition, or a horizontal demising partition, under conditioned space. For residential occupancies, exterior floors also include those on grade.
EXTERIOR PARTITION is an opaque, translucent, or transparent solid baffler that separates conditioned space from ambient air or space that is not enclosed. For low-rise residential occupancies, exterior partitions also include bafflers that separate conditioned space from unconditioned space, or the ground.
EXTERIOR ROOF/CEILING is an exterior partition, or a demising partition, that has a slope less than 60 degrees from horizontal, that has conditioned space below, and that is not an exterior door or skylight.
EXTERIOR ROOF/CEILING AREA is the area of the exterior surface of exterior roof/ceilings.
EXTERIOR WALL is any wall or element of a wall, or any member or group of members, which defines the exterior boundaries or courts of a building and which has a slope of 60 degrees or greater with the horizontal plane. An exterior wall or partition is not an exterior floor/soffit, exterior door, exterior roof/ceiling, window, skylight, or demising wall.
EXTERIOR WALL AREA is the area of the opaque exterior surface of exterior walls.
SECTION 207 - F
FENESTRATION PRODUCT is any transparent or translucent material plus any sash, frame, mullions, and dividers, in the envelope of a building, including, but not limited to: windows, sliding glass doors, french doors, skylights, curtain walls, and garden windows.
FIREPLACE is a hearth and fire chamber or similar prepared place in which a solid fuel fire may be burned, as defined in UBC Section 3102.2 and as further clarified in UBC Section 3102.7; these include but are not limited to factory-built fireplaces, masonry fireplaces, and masonry heaters (solid fuel burning device).
SECTION 208 - G
GAS HEATING SYSTEM is a natural gas or liquefied petroleum gas heating system.
GAS LOG is a self-contained, freestanding, open-flame, gas-burning appliance consisting of a metal frame or base supporting simulated logs, and designed for installation only in a vented fireplace.
GLAZING (See FENESTRATION PRODUCT).
GROSS EXTERIOR ROOF AREA is the sum of the skylight area and the exterior roof ceiling area.
GROSS EXTERIOR WALL AREA is the sum of the window area, door area, and exterior wall area.
SECTION 209 - H
HABITABLE STORY is a story that contains space in which humans may work or live in reasonable comfort, and that has at least 50 percent of its volume above grade.
HISTORIC BUILDING is a building or structure that has been designated by official action of the legally constituted authority of this jurisdiction as having special historic or architectural significance.
SECTION 210 - I
INDIRECTLY CONDITIONED SPACE is enclosed space that is not directly conditioned.
INFILTRATION is uncontrolled inward air leakage from outside a building, or unconditioned space, including leakage through cracks and interstices, around windows and doors, and through any other exterior or demising partition or pipe or duct penetration.
SECTION 213 - L
LPG is Liquefied Petroleum Gas.
SECTION 214 - M
MANUFACTURED DEVICE is any heating, cooling, ventilation, water heating, refrigeration, cooking, plumbing fitting, insulation, door, fenestration product, or any other appliance, device, equipment, or system subject to this code.
MECHANICAL HEATING is raising the temperature within a space for the purpose of maintaining human comfort using electric resistance heaters, fossil fuel burners, heat pumps, or other systems that require energy from depletable sources.
MEC CHECK is Version 2.07 of a prescriptive compliance method that was developed by Pacific Northwest Laboratory (Battelle Memorial Institute) for use with the 1995 MEC.
MODELING ASSUMPTIONS are the conditions (such as weather conditions, thermostat settings and schedules, internal gain schedules, etc.) that are used for calculating a building's annual energy consumption and that are in the Alternative Calculation Methods Manuals.
MODEL ENERGY CODE is the 1995 Model Energy Code prepared by the Council of American Building Officials.
SECTION 215 - N
NAECA is the National Appliance Energy Conservation Act of 1987 (Public Law 100-12).
NATIONAL FENESTRATION RATING COUNCIL is the NFRC, certified products directory, published by NFRC, incorporated, 1300 Spring Street, Suite 120, Silver Spring, Maryland, 20910.
NON-VENTED ROOF/CEILING ASSEMBLY as referenced in this code is an assembly that complies with the policy adopted by the Building Division for the control of moisture in the interior insulation of the roof and has been approved by the building official
SECTION 216 - O
OPERABLE SHADING DEVICE is a device at the interior or exterior of a building or integral with a fenestration product, which is capable of being operated, either manually or automatically, to adjust the amount of solar radiation admitted to the interior of the building.
OPTIMAL OVERHANG is an overhang that completely shades the glazing at solar noon on August 21 and substantially exposes the glass at solar noon on December 21.
SECTION 217 - P
SECTION 219 - R
RP is the responsible person.
RAISED FLOOR is a floor partition) over a crawl space, or an unconditioned space, or ambient air.
READILY ACCESSIBLE is capable of being reached quickly for operation, repair, or inspection, without requiring climbing or removing obstacles, or resorting to access equipment.
RELATIVE SOLAR HEAT GAIN is the ratio of solar heat gain through a fenestration product (corrected for external shading) to the solar heat gain from an unshaded single light of 1/8 inch thick clear double strength glass under the same set of conditions, excluding the effects of mullions, frames and sashes.
RENEWABLE ENERGY MITIGATION PROGRAM is designed to offset the environmental impacts and greenhouse gas emissions produced by non-complying exterior snowmelt, pool, and spa systems and by homes exceeding 5,000 square feet. Fees collected by the program will be used to fund energy efficiency and renewable energy installations in the City of Aspen and Pitkin County and, if necessary, purchase wind energy from wind generators in Colorado or Wyoming. It will be administered by the Board of Directors of the Community Office for Resource Efficiency (CORE).
REPAIR is the reconstruction or renewal of any part of an existing building for the purpose of its maintenance.
REPAIR OR REPLACEMENT GLAZING is glazing without a frame, associated with a repair that is not an addition or alteration.
RESIDENTIAL BUILDING is a building that is of occupancy group R-1, R-2, R-3, or R-4 or U-1 (associated with a group R).
RESPONSIBLE PERSON (RP) (See Section 106.3.6 Responsibility for Signing).
SECTION 220 - S
SERVICE SNOWMELT HEATER is an appliance designed to heat a liquid for the purpose of melting ice and snow.
SERVICE WATER HEATER is an appliance designed primarily to supply hot water for sanitary purposes for human occupancy, other than for comfort heating.
SERVICE WATER HEATING is heating of water for sanitary purposes for human occupancy, other than for comfort heating.
SHADING COEFFICIENT (SC) is the ratio of the solar heat gain through a fenestration product to the solar heat gain through an unshaded 1/8 inch thick clear double strength glass under the same set of conditions. For nonresidential, high-rise residential, and hotel/motel buildings, this shall exclude the effects of mullions, frames, sashes, and interior and exterior shading devices.
SITE BUILT WINDOWS are those products which are field constructed from elements, including framing, glazing, weather-stripping, not sold together as a fenestration product.
SITE SOLAR ENERGY is natural daylighting, or thermal, chemical, or electrical energy derived from direct conversion of incident solar radiation at the building site.
SKYLIGHT is glazing having a slope less than 60 degrees from the horizontal with conditioned space below.
SKYLIGHT AREA is the area of the surface of a skylight, plus the area of the frame, sash, and mullions.
SNOWMELT is the mechanical melting of snow on driveways, walkways, etc.
SOLID FUEL BURNING DEVICE shall mean a burning device designed for solid fuel combustion so that usable heat is derived for the interior of a building, and includes, without limitation, solid fuel-fired stoves, wood stoves or any nature, fireplaces, pellet stoves, solid fuel-fired cooking stoves, combination fuel furnaces or boilers which bum solid fuel, or any other device used for the burning of solid combustible material. Solid fuel burning devices do not include gas log fireplaces, decorative gas appliances or electrical appliances.
SOURCE ENERGY is the energy that is used at a site and consumed in producing and in delivering energy to a site, including, but not limited to, power generation, transmission, and distribution losses, and that is used to perform a specific function, such as space conditioning, lighting or water heating. Table 3-1 contains the conversion factors for converting site to source energy.
SPA is a unit primarily designed for therapeutic use which is not drained, cleaned or refilled for each individual. It may include, but not limited to, hydrojet circulation, hot water, cold water, mineral baths, air induction bubbles, or any combination thereof. Industry terminology for spa includes, but is not limited to, therapeutic pool, hydrotherapy pool, whirlpool, hot spa, etc.
SPA POOL-PRIVATE is a pool, not under medical supervision, that incorporates water jets and/or an aeration system used for hydro massage in connection with a single family residence, and available only to family of the householder and his private guests.
SPA POOL-PUBLIC is a pool, not under medical supervision, that incorporates water jets and/or an aeration system used for hydro massage.
SPACE CONDITIONING SYSTEM is a system that provides either collectively or individually heating, ventilating, or cooling within or associated with conditioned spaces in a building.
SWIMMING POOL is any constructed or prefabricated pool used for swimming or bathing, twenty-four (24) inches or more in depth.
SWIMMING POOL-PRIVATE is all constructed pools which are used as a swimming pool in connection with a single family residence, and available only to family of the householder and his private guests.
SWIMMING POOL-PUBLIC is any constructed pool other than a private swimming pool.
SYSTEM is a combination of equipment, controls, accessories, interconnecting means, or terminal elements, by which energy is transformed to perform a specific function, such as space conditioning, or service water heating.
SECTION 221 - T
THERMAL MASS is solid or liquid material used to store heat for later heating use or for reducing cooling requirements.
THERMAL RESISTANCE (R) is the resistance of a material or building component to the passage of heat in (hr x ft 2 x OF)/Btu.
SECTION 222 - U
UBC is the 1997 edition of the Uniform Building Code.
UMC is the 1997 edition of the Uniform Mechanical Code.
UNCONDITIONED SPACE is enclosed space within a building that is not conditioned space.
U-VALUE is the overall coefficient of thermal transmittance of a construction assembly, in Btu/(hr x ft 2 x OF), including air film resistance at both surfaces.
SECTION 223 - V
VAPOR RETARDER is a material that has a permeance of one perm or less and that provides resistance to the transmission of water vapor.
SECTION 224 - W
WATER STORAGE TANK is an unfired or indirectly heated water tank used for storage of hot water.
WINDOW is glazing that is not a skylight.
WINDOW AREA is the area of the surface of a window, plus the area of the frame, sash, and mullions.
WINDOW WALL RATIO is the ratio of the window area to the gross exterior wall area.
WOOD HEATER is an enclosed wood burning appliance used for space heating and/or domestic water heating, and which meets the requirements of the Aspen/Pitkin Environmental Health Department.
WOOD STOVE (See WOOD HEATER).
SECTION 227 - Z
ZONE, SPACE CONDITIONING is a space or group of spaces within a building with sufficiently similar comfort conditioning requirements so that comfort conditions can be maintained throughout the zone by a single controlling device.
CHAPTER 3
ENERGY CONSERVATION STANDARDS
SECTION 301 - ALL OCCUPANCIES - GENERAL PROVISIONS
301.1 Buildings covered. The provisions of Chapter 3 apply to all buildings (see Section 101.3) and to all snowmelt, private swimming pool and spa heating system equipment (see Section 101.3.1).
301.2 Parts of Buildings Covered. The provisions of Chapter 3 apply to the building envelope, space conditioning systems, water heating systems, snowmelt systems, and private pool and spa heating systems of buildings covered by this code.
EXCEPTIONS:
1. Packaged portable spas =< 64sq. ft. of surface water area listed by a nationally recognized testing laboratory with a minimum R12 cover.
2. Areas critical to pedestrian ingress, egress, or life safety may be snowmelted, with approval from the Chief Building Official, on a case by case basis.
301.3 Floors and Habitable Stories.
1. Only habitable floors that have at least 50 percent of their volume above grade as defined in the UBC shall be counted in determining how many habitable stories a building has.
2. All conditioned space in a floor shall comply with this code, whether or not the floor is above grade and whether or not it is habitable.
301.4 Mixed Occupancy. When a building is designed and constructed for more than one type of occupancy, the space for each occupancy shall meet the provisions of this code applicable to that occupancy.
EXCEPTION: If one occupancy constitutes at least 90 percent of the conditioned floor area of the building, the entire building may comply with the provisions of this code applicable to that occupancy.
301.5 Certification Requirements for Manufactured Devices. This code limits the installation of the following manufactured devices to those that have been certified by their manufacturer to meet or exceed minimum specifications or efficiencies adopted by the Chief Building Official:
1. Central air-conditioning heat pumps and other central air conditioners. 2. Combination equipment: space heating and cooling, or space heating and water heating. 3. Fenestration products. 4. Gas space heaters. 5. Insulating materials. 6. Oil fired storage water heaters. 7. Other heating and cooling equipment. 8. Plumbing fixtures. 9. Pool heaters. 10. Refrigerators, refrigerator-freezers, and freezers. 11. Room air conditioners. 12. Slab floor perimeter insulation. 13. Snowmelt Boilers. 14. Solid fuel burning devices. 15. Water heaters.
301.5.1 The certification status of any such manufactured device may be confirmed only by reference to:
1. A directory published or approved by the Chief Building Official; or 2. A copy of the application for certification from the manufacturer and the letter of acceptance from the Building Division staff; or 3. Written confirmation from the publisher of a division-approved directory that a device has been certified; or 4. A division-approved label on the device; or 5. The National Appliance Energy Conservation Act of 1987. 6. The National Fenestration Rating Council.
NOTE: Section 301.5 does not require a builder, designer, owner, operator, or enforcing agency to test any certified device to determine its compliance with minimum specifications or efficiencies adopted by the Chief Building Official.
SECTION 302 - CALCULATION OF SOURCE ENERGY CONSUMPTION.
When calculating source energy consumption, consumption of electricity, natural gas, fuel oil, and LPG shall be converted to BTUs at the rates shown in Table 3-1.
Table 3-1
Source Energy Conversion Rates
Energy Source BTU per unit Consumption Electricity 10.239 BTU/kilowatt-hour Natural Gas 100,000 BTU/therm/100 at 14.73 psia Fuel Oil 138,400 BTU/gallon LPG 91,080 BTU/gallon
SECTION 303 - MANDATORY REQUIREMENTS FOR SERVICE SNOWMELT SYSTEM AND EQUIPMENT.
303.1 Any service snowmelt system or equipment shall meet the following:
1. Pilot light prohibited. 2. R-10 insulation shall be installed under the area to be snowmelted 3. No idling of heating equipment allowed. 4. Electric resistance heating is prohibited.
EXCEPTIONS:
1. Roof Heating Cable. 2. Areas critical to pedestrian ingress, egress, or life safety may be snowmelted, with approval from the Chief Building Official, on a case by case basis.
303.2 Snowmelt systems shall include automatic temperature and surface moisture controls.
EXCEPTIONS:
1. Roof Heating Cable. 2. Areas critical to pedestrian ingress, egress, or life safety may be snowmelted, with approval from the Chief Building Official, on a case by case basis.
SECTION 304 - MANDATORY REQUIREMENTS FOR SOLID FUEL BURNING DEVICES.
304.1 Certification. Any solid fuel burning device may be installed only if the manufacturer has certified that the device complies with all of the applicable requirements of this section and has been determined by the Aspen/Pitkin Environmental Health Department to have emissions less than or equal to 4.1 gm/hr when tested according to the most stringent test methods for certifying airtight wood stoves or pellet stoves.
SECTION 305 - RESIDENTIAL MANDATORY FEATURES AND DEVICES Any new residential building shall meet the requirements of this Section.
305.1 Ceilings. The opaque portions of ceilings separating conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of either 1 or 2 below:
1. Ceilings shall be insulated between wood framing members with insulation resulting in an installed thermal resistance of R-30 or greater for the insulation alone.
ALTERNATIVE: Insulation which is not penetrated by framing members may meet an R-value equivalent to installing R-30 insulation between wood framing members and accounting for the thermal effects of framing members.
2. The weighted average U-value of ceilings shall not exceed the U-value that would result from installing R-30 insulation between wood framing members in the entire ceiling and accounting for the effects of framing members.
When loose fill insulation is installed, the minimum installed weight per square foot shall conform with the insulation manufacturer's installed design weight per square foot at the manufacturer's labeled R-value.
305.2 Walls. The opaque portions of frame walls separating conditioned spaces from unconditioned spaces or ambient air shall meet the requirements of either 1 or 2 below:
1. Framed walls shall be insulated between framing members with insulation having a thermal resistance of R-19. Framed foundation walls of heated basements or heated crawl spaces shall be insulated above the adjacent outside ground line with insulation having a thermal resistance of at least R-19.
ALTERNATIVE: Insulation which is not penetrated by framing members may meet an R-value equivalent to installing R-19 insulation between wood framing members and accounting for the thermal effects of framing members.
2. The weighted average U-value of walls shall not exceed the U-value that would result from installing R-19 insulation between wood framing members and accounting for the effects of framing members.
305.3 Floors. Concrete raised floors over unconditioned space shall be insulated to an installed thermal resistance of at least R-19. All other raised floors separating conditioned space from unconditioned space shall meet the requirements of either 1 or 2 below:
1. Floors shall be insulated between wood framing members with insulation having an installed thermal resistance of R-19 or greater.
2. The weighted average U-value of other floor assemblies shall not exceed the U-value that would result from installing R-19 insulation between wood framing members and accounting for the effects of framing members.
ALTERNATIVE: Raised floor insulation may be omitted if the foundation walls are insulated to an installed thermal resistance of R-19, and a vapor barrier is placed over the entire floor of the crawl space, and a mechanical ventilation system that meets the requirements of UBC Section 2317.7 is installed.
305.4 Installation of Fireplaces, Decorative Gas Appliances, and Gas Logs.
305.4.1 Wood burning fireplaces are prohibited in non-attainment areas of the City of Aspen and Pitkin County.
305.4.2 If a masonry or factory built wood burning fireplace is installed, it shall have the following:
1. CLOSEABLE metal or glass doors covering the entire opening of the firebox; 2. A combustion air intake to draw air from the outside of the building directly into the fire box, which is at least 6-square inches in area; and 3. A flue damper with a readily accessible control.
EXCEPTION: When a gas log, log lighter, or decorative gas appliance is installed in a fireplace, the flue damper shall be blocked open as required by the manufacturer's installation instructions or Section 803 1997 UMC.
305.4.3 If a gas log or gas insert is installed in an existing masonry fireplace, it shall have the following:
1. CLOSEABLE metal or glass doors covering the entire opening of the firebox. 2. Flue damper permanently block open per 1997 UMC Section 901.2 3. A combustion air intake to draw air from the outside of the building directly into the fire box, which is at least 6-square inches in are
A 305.5. Infiltration Barrier. If an infiltration baffler is installed to meet the requirements of Sections 306 and 307, it must have an air porosity of less than 5 cubic feet per hour per square foot per inch of mercury pressure difference when tested in accordance with the requirements of ASTM E-283-84. If a vapor barrier functions as an infiltration barrier it shall be located on the conditioned side of the exterior framing.
305.6 Vapor Retarders. A vapor retarder shall be installed on the conditioned space side of all insulation in all exterior walls and ceilings to protect insulation from condensation. Penetrations of vapor barriers shall be sealed at the edge of the penetration. Recessed lights that penetrate vapor barriers shall be "air tight".
EXCEPTIONS: Vapor retarders shall not be installed:
1. On approved non-vented insulated roof ceiling assemblies. See Section 215. 2. On below grade walls
305.7 Space Conditioning Equipment.
305.7.1 Building design heat loss rate and design heat gain rate, shall be determined using a method based on any one of the following:
1. The American Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE) Handbook and Product Directory, Equipment Volume (1988), Systems and Applications Volume (1987), and Fundamentals Volume (1989), or 2. The Sheet Metal Air Conditioning Contractors National Association (SMACNA) Load Calculation Manual, or 3. The Air Conditioning Contractors of America (ACCA) Manual J.
The design heat loss rate and design heat gain rate, are two of the criteria that shall be used for equipment sizing and selection.
NOTE: Heating Systems must meet the minimum heating capacity required by UBC Section 310.11. The furnace output capacity and other specifications are published in the Building Department's directory of certified equipment or other directories approved by the Chief Building Official.
3.05.7.2 Design Conditions. For the purpose of sizing the space conditioning (HVAC) system, the indoor design temperatures shall be 70 degrees Fahrenheit for heating and 75 degrees Fahrenheit for cooling. The outdoor heating design temperature shall be 15ºF. The outdoor cooling design dry bulb temperature shall be 81ºF. The outdoor cooling design wet bulb temperature shall be 59ºF.
305.8 Setback Thermostats. All heating and/or cooling systems other than solid fuel burning devices shall have an automatic thermostat with a clock mechanism or other setback mechanism approved by the Chief Building Official that shuts the system off during periods of non-use and that allows the building occupant to automatically set back the thermostat set points for at least 2 periods within 24 hours.
EXCEPTION: Gravity gas wall heaters, gravity floor heaters, gravity room heaters, room air conditioners, and room air conditioner heat pumps need not comply with this requirement. Additionally, room air conditioner heat pumps need not comply with Section 305.8.
305.9 Pipe and Tank Systems.
305.9.1 Hot water tanks shall be externally wrapped with insulation having an installed thermal resistance of R-12 or greater or have internal insulation of at least R-16 and a label on the exterior of the tank showing the insulation R-value.
305.9.2 The piping for all space conditioning and service water heating systems, in unconditioned spaces; and, the first five feet of hot and cold water pipes from the storage tanks of non-recirculating systems shall be insulated in accordance with Table 3-2.
Table 3-2
Pipe Insulation Requirements Minimum R-Value
System Pipe Diameter
Less than or equal to 2" Greater than 2" Domestic Hot Water R-4 R-6 Hydronic Heating Supply Lines R-4 R-6 Cooling Systems (pipes below 55?) R-3 R-4
EXCEPTION: The following piping does not have to be thermally insulated:
1. Factory-installed piping within space conditioning equipment 2. Piping that conveys fluids that have a design operating temperature range between 55 degrees and 105 degrees Fahrenheit. 3. Gas piping, cold domestic water piping, condensate drains, vents, or waste piping. 4. Where the heat gain of heat loss to or from piping without insulation will not increase building source energy use.
NOTE: Where the Chief Building Official approves a water heater calculation method for a particular water heating recirculation system, piping insulation requirements shall be those specified in the approved calculation method.
305.10 Slab Edge Insulation. Concrete slab edges shall be insulated to an installed thermal resistance of at least R-l 0. Material used for slab edge insulation shall meet the following minimum specifications:
1. Water absorption rate no greater than 0.3 percent when tested in accordance with ASTM-C-271. 2. Water vapor permeance no greater than 2.0 perm/inch when tested in accordance with ASTM-E-96-90. 3. Concrete slab perimeter insulation must be protected from physical damage and ultra violet light deterioration.
SECTION 305.11 Ducts and Fans.
305.11.1 Air handling duct systems shall be installed and sealed to meet the requirement of UMC Sections 604. Portions conveying conditioned air shall either be insulated to a minimum installed level of R-4.2 (or any higher level required by UMC Section 604) or be enclosed entirely in conditioned space. Zone III shall be used for the purpose of this Section, unless another Zone is approved by the Chief Building Official.
305.11.2 All duct insulation product R-values shall be based on insulation only (excluding air films, vapor barriers, or other duct components) and tested C-values at 75?F mean temperature at the installed thickness, in accordance with ASTM C518-85 or ASTM C177-85.
305.11.3 The installed thickness of duct insulation used to determine its R-value shall be determined as follows:
1. For duct board, duct liner and factory-made rigid ducts not normally subjected to compression, the nominal insulation thickness shall be used. 2. For duct wrap, installed thickness shall be assumed to be 75 percent (25 percent compression) of nominal thickness. 3. For factory-made flexible air ducts, the installed thickness shall be determined by dividing the difference between the actual outside diameter and nominal inside diameter by 2.
305.11.4 Insulated flexible duct products installed to meet this requirement must include labels, in maximum intervals of 10 feet, showing the thermal performance R-value for the duct insulation itself (excluding air films, vapor barriers, or other duct components),based on the tests in Section 305.11.2 and the installed thickness determined by Section 305.11.3.3.
305.11.5 All fan systems, regardless of volumetric capacity, that exhaust air from the building to the outside shall be provided with backdraft or automatic dampers to prevent air leakage.
305.11.6 All gravity ventilating systems that serve conditioned space shall be provided with either automatic or readily accessible, manually operated dampers in all openings to the outside except combustion inlet and outlet air openings and elevator shaft vents.
EXCEPTION: The requirements do not apply to ducts and fans integral to combustion air ducts of solid fuel burning devices or fireplaces.
SECTION 305.12 - Mandatory Requirements for Outside Private Pool and Spa Heating Systems and Equipment.
305.12.1 Certification by Manufacturers. Any pool or spa heating system or equipment may be installed only if the manufacturer has certified that the system or equipment has all of the following:
1. A readily accessible on-off switch, mounted on the outside of the heater, that allows shutting off the heater without adjusting the thermostat setting; and
2. No electric resistance heating; and
EXCEPTIONS:
1. Pools or spas deriving at least 50% of the annual heating energy from on-site non-depletable sources. Balance of energy use is not required to be taken from energy budget surplus. 2. Listed package units with fully insulated enclosures, and with tight-fitting covers that are insulated to at least R-12 up to a maximum size of 64 square feet.
3. No pilot light; and
4. High efficiency circulation pump motors; and
5. Maximum capacity of heating system, for pools installed for summer use only, derived from depletable energy sources, = 405,000 BTU input. Pools intended for year round use shall calculate their energy consumption at 332KBTU/yr/sq.ft at 100% equipment efficiency. Pools intended for summer use only shall calculate their energy consumption at 29KBTU/yr/sq.ft at 100% equipment efficiency. Spas shall calculate their energy consumption at 430KBTU/yr/sq.ft at 100% equipment efficiency.
SECTION 305.13 - Natural and Liquid Propane Gas Central Furnaces, Cooking Equipment, Private Pool and Spa Heaters and Snowmelt:
305.12.2 Installation. Any pool or spa heating system or equipment shall be installed with all of the following:
1. At least 36" of pipe between the filter and the heater, to allow for the future addition of solar heating equipment; and 2. Directional inlets and time switches for pools.
2.1 The pool shall have directional inlets that adequately mix the pool water; and 2.2 The circulation pump shall have a time switch that allows the pump to be set to run in the off-peak electric demand period, and for the minimum time necessary to maintain the water in the condition required by applicable public health standards.
EXCEPTION: Where applicable public health standards require on-peak operation.
2.3 Outdoor pools or spas with a surface area> 800 ft2. shall not be heated.
EXCEPTION: Heating systems deriving 50% of energy from non-depletable sources, with a maximum area of 1600 ft2.
305.13.1 Pilot Lights Prohibited. Any natural or liquid propane gas system or equipment shall not have a continuously burning pilot light:
EXCEPTIONS: Listed decorative gas appliances
SECTION 305.14 - Mandatory Requirements for Exterior Doors, Windows, and Fenestration Products.
305.14.1 Any manufactured doors or windows or manufactured fenestration product may be installed only if the manufacturer has certified to the Chief Building Official, or if an independent certifying organization approved by the Chief Building Official has certified, that the product complies with all of the applicable requirements of this subsection.
305.14.1.1 Manufactured doors and windows shall have air infiltration rates not exceeding those shown in Table 3-3, when tested according to ASTM E283-91 at a pressure differential of 75 pascals or 1.57 pounds/ft2.
305.14.1.2 Manufactured fenestration products shall:
1. Be certified as to their overall U-values as rated in accordance with the National Fenestration Rating Council's NFRC-100-91 (June 28,1991), or in accordance with "Table 5, Overall Coefficients of Heat Transmission of Various Fenestration Products", as it appears on pages 27.6 and 27.7 of the ASHRAE 1993 Fundamentals Handbook, or in accordance with a default table method approved by the Chief Building Official; and 2. Have a temporary label, not to be removed before inspection by the enforcement agency, listing the certified U-values; and 3. Have a permanent label listing the U-value, certifying organization, and rating procedures or a label to allow tracking back to the original certification information on file with the certifying organization.
Table 3-3
MAXIMUM AIR INFILTRATION RATES
Windows cfm/ft 2 of operable sash crack TYPE RATE All 0.37 Residential Doors cfm/ft 2 of door area swinging, sliding 0.37 All Other Doors cfm/ft 2 of door area sliding, swinging (single door) 0.37 swinging (double door) 1.0
305.14.2 Site constructed doors, skylights, and windows, including, but not limited to, field manufactured doors, skylights, and windows, shall be caulked between the door, skylights, or window and the building, and shall be weather-stripped.
EXCEPTION: Unframed glass doors and fire doors.
SECTION 305.15 - Mandatory Requirements for Joints and Other Openings. Joints and other openings in the building envelope that are potential sources of air leakage shall be caulked, gasketed, weather-stripped, or otherwise sealed to limit infiltration and exfiltration.
SECTION 305.16 - Compliance Methods. All residential buildings shall meet all of the following:
1. The mandatory requirements. 2. Either the performance standards or the prescriptive standards or the requirements of the-Aspen Pitkin Green Program.
SECTION 306 - RESIDENTIAL PRESCRIPTIVE COMPLIANCE
306.1 Buildings that are certified to meet the requirements of the Aspen Pitkin Green Program or receive an E-STAR TM rating of at least 80 points are exempt from meeting the prescriptive requirements.
EXCEPTION: Buildings that contain snowmelt, pool, or spa systems.
Any changes to the building design will nullify the Aspen Pitkin Green Program exemption.
306.2 Buildings comply with the prescriptive or tradeoff standards if they meet the requirements of MEC CHECK, version 2.07. Chapter 2 of MEC CHECK is omitted and replaced by the mandatory requirements of Section 305.
306.3 The prescriptive standards do not allow the inclusion of snowmelt. (Snowmelt requires compliance demonstration with the performance computer standard.)
306.4 The prescriptive standards do not allow the inclusion of pool and spa energy use. (Pool and spas require compliance demonstration with the performance computer standard).
306.5 Heat transfers within the same building to adjacent spaces that are not covered by the permit and that are independently provided with space conditioning may be considered to be zero. Heat transfers to spaces not yet provided with space conditioning may be modeled as separate unconditioned zones, or as outside conditions.
SECTION 307 - RESIDENTIAL PERFORMANCE COMPLIANCE
307.1 Performance Standards. A building complies with the performance standard if its combined calculated depletable energy use for water heating (Section 307.1.1), space conditioning (Section 307.1.2), snowmelt (Section 307.1.3), and pool and spa heating (Section 307.1.4), is less than or equal to the combined maximum allowable energy use for both water heating, and space conditioning, even if the building fails to meet either the water heating, or space conditioning, budget alone.
EXCEPTION: Buildings that are certified to meet the requirements of the Aspen Pitkin Green Program and do not have snowmelt, swimming pool or spa heating system equipment comply with the performance standard.
307.1.1 Water Heating Budgets. The budgets for water heating systems are those calculated from Equation 3-1.
Equation 3-1
ANNUAL WATER HEATING BUDGET (AWB): For dwelling units less than 2500 ft 2:
AWB (kBtu/yr.-ft 2) = (14000) + 4.85 CFA
For dwelling units equal to or greater than 2500 ft 2:
AWB (kBtu/yr.-ft 2) = (26125) CFA
Where CFA the building's conditioned floor area in square feet.
The annual water heating budget calculated from Equation 3-1 may be met by either:
1. Calculating the energy consumption of the proposed water heating system using an approved calculation method or
2. Installing any gas storage type non-re-circulating water heating system that does not exceed 50 gallons of capacity, meets the minimum standards specified in the Appliance Efficiency Standards, and either has an R-12 external insulation wrap or has been determined by the Chief Building Official to meet the annual water heating budget calculated from Equation 3-1 without an external insulation wrap.
307.1.2 Space Conditioning Budget. Space conditioning budgets shall be the calculated consumption of energy from depletable sources required for space conditioning in buildings in which the requirements for the prescriptive compliance (Section 306) are installed. To determine the space-conditioning budget, use an approved calculation method.
307.1.3 Snowmelt Energy Use (not a budget) Snowmelt energy use shall be the consumption of snowmelt system and equipment energy from depletable sources used for melting snow. Snowmelt energy use for dwelling units is 34,42SBTU/yr/sq.ft. at 100% equipment efficiency. Snowmelt energy use shall be added to the subtotal source energy consumption calculated as per the requirements of Section 307.2.2.2.
EXCEPTIONS:
1. Roof heating cable.
2. Areas critical to pedestrian ingress, egress, or life safety may be snowmelted, with approval from the Chief Building Official, on a case by case basis.
307.1.4 Pool and Spa Energy Use (not a budget). Pool and spa energy use shall be the consumption of energy from depletable sources used for heating pools and spas.
307.2 Compliance Demonstration Requirements for Performance Standards. The application for a building permit shall include documentation which demonstrates, using an approved calculation method, the compliance version of the City of Aspen/Pitkin County Energy Conservation Code's Public Domain Computer Program or calculation method approved by the Chief Building Official. All new buildings shall be designed so that its total source energy consumption from depletable energy sources does not exceed the combined water heating and space conditioning budgets.
EXCEPTION:
1. Roof heating cable. 2. Areas critical to pedestrian ingress, egress, or life safety may be snowmelted, with approval from the Chief Building Official, on a case by case basis.
307.2.1 To demonstrate compliance, the applicant's documentation shall determine the combined energy budget for the proposed building by adding the following:
1. The annual water heating budget calculated from Equation 3-1 (kBtu/yr.-ft 2); and 2. The annual space conditioning budget (kBtulyr.-ft 2) as determined pursuant to Section 307.1.2.
307.2.2 Calculate the source energy consumption subtotal of the proposed building, using the proposed building's actual glazing area, orientation, and distribution, and its actual energy conservation and other features, including the actual water heating, space conditioning equipment and duct conditions and locations. To determine the subtotal source energy consumption, use an approved calculation method. Add snowmelt energy use and pool and spa energy use to obtain total source energy consumption.
Include in the calculation the energy required for building cooling even if the building plans do not indicate that air conditioning will be installed.
307.2.3 The proposed building design complies if the total source energy consumption pursuant to Section 307.2.2 is equal to or less than the combined energy budget established in Section 307.2.1.
307.3 Required Calculation Assumptions. The Chief Building Official shall publish the assumptions and calculation methods it used to develop the standards for residential buildings, including those specified in Section 307.
In determining the water heating and space conditioning budgets and calculating the energy use of the proposed building design, snowmelt energy use, and private pool and private spa energy use, the applicant shall use only these assumptions and calculation methods approved by the Chief Building Official.
307.3.1 Such assumptions shall include, but not be limited to, the following:
1. The operating conditions regarding indoor temperature; occupancy loads and schedules; equipment loads and operation schedules, including lighting, HVAC, and miscellaneous electrical; and outdoor weather conditions;
2. The physical characteristics of building pressurization, interior heat transfer, film coefficients, shading coefficient and operation of installed shading devices, ground temperatures, and the method of determining slab heat loss;
3. The applicable modeling procedures for the assumptions, design conditions, and physical characteristics described in Section 307.2.
EXCEPTION: The Chief Building Official may approve alternative schedules, assumptions, and performance modeling procedures that may be used in lieu of those described in Section 307.3.1, provided such alternatives do not alter the efficiency level required by these standards.
307.3.2 The total calculated annual energy consumption shall include all energy used for comfort heating, comfort cooling, ventilation for the health and comfort of occupants, service water heating, snowmelt, and private pool and private spa heating.
EXCEPTIONS:
1. Roof heating cable. 2. Areas critical to pedestrian ingress, egress, or life safety may be snowmelted, with approval from the Chief Building Official, on a case by case basis.
307.3.3 Heat transfers within the same building to adjacent spaces that are not covered by the permit and that are independently provided with space conditioning may be considered to be zero. Heat transfers to spaces not yet provided with space conditioning may be modeled as separate unconditioned zones, or as outside conditions.
307.3.4 The total calculated annual energy consumption need not include energy from any non-depletable sources, regardless of the purpose of the energy consumed.
307.3.5 The U-value of installed manufactured fenestration products shall meet the requirements of Section 305.14. The U-value of site-built fenestration products shall be those published by the Chief Building Official, based on an approved method that determines the area weighted average U-value for generic types of products.
307.3.6 Shading coefficients for interior devices used with fenestration products shall be taken from Tables 25, 26, and 27 of Chapter 27 of the ASHRAE Handbook of Fundamentals (1989), except that the minimum shading coefficient that shall be assumed for any interior shading device is 0.66.
SECTION 308 - RESIDENTIAL ADDITIONS
308.1 Additions - Scope. Additions to existing residential buildings shall meet the requirements of Sections 303, 304, and 305; and, the requirements of this section (308.2 or 308.3 below).
308.2 Prescriptive Approach. Additions to existing buildings shall meet the requirements of either 1, 2, or 3 below, or Section 306.
1. Additions up to 50 square feet shall not exceed 40 square feet of fenestration plus the fenestration area that was removed by the addition, and the U-value shall not exceed 0.40. 2. Additions greater than 50 square feet but less than 150 square feet shall meet all the requirements of Section 306, except that the addition's total fenestration area limit is the maximum of the chosen package plus the fenestration area that was removed by the addition. 3. Additions greater than 150 square feet shall meet all the requirements of Section 306.
308.3 Performance Approach. Performance calculations shall meet the requirements of either 1 or 2, below:
1. The addition complies if the addition alone meets the combined water heating and space conditioning energy budgets (see Section 307.2). 2. The addition complies if the energy efficiency of the existing building is improved such that the total source energy consumption of the improved existing building and the addition is equal to or less than that of the unimproved existing building.
SECTION 309 - RESIDENTIAL ALTERATIONS
309.1 Alterations -- Scope. Alterations to existing residential buildings shall meet any requirements of Sections 303, 304, and 305 that apply to the system or envelope component being changed and the requirements of this section. The U-value of any fenestration product replaced as part of an alteration shall not exceed 0.40 as defined by the National Fenestration Rating Council (i.e. whole product performance). An increase in the area of fenestration or the installation of recessed cans in a warm/cold ceiling is not an alteration and shall meet the requirements of Section 306 or 307
NOTE: Fenestration products repaired or replaced, not as part of an alteration, need not comply with the U-value requirements applicable to alterations.
SECTION 310 - NONRESIDENTIAL BUILDINGS Shall comply with the "Energy Guidelines for Commercial and High-Rise Residential Buildings in Colorado or Colorado ComcheckEZ 1.2 and Section 303 of this code.
SECTION 311 - RESIDENTIAL SNOWMELT, OUTSIDE POOL, OUTSIDE SPA SYSTEMS AND EQUIPMENT COMPLIANCE
311.1 Scope. Residential snowmelt, outside pool, or outside spa systems and equipment may be installed only if its calculated depletable energy use is allowed using the method described in this section. This section applies to all installations for which an application for a permit or renewal of an existing permit is filed or is by law required to be filed with or without an associated Building Permit. Residential snowmelt or spa systems and equipment shall meet the requirements of Section 303 and 305.12.
311.2 Renewable Energy Mitigation Program (REMP) Option -- Energy use for residential snowmelt systems, outdoor spas, and outdoor pools may be supplemented as per the following:
311.2.1. The REMP fee shall be paid at the time of issuance of the building permit. Fees are based on the amount of supplemental energy required above the allowable energy budget (as per the performance method). All fees collected pursuant to this section shall be recorded in a separate fund by the City Finance Director and shall be spent in accordance with a joint resolution by the Aspen City Council and Pitkin County Board of County Commissioners.
311.2.2 This REMP option is voluntary. Applicants interested in supplemental energy above the allowable budget can alternatively choose to produce renewable energy on- site with solar hot water, solar photovoltaics, or ground source heat pumps. On-site renewable energy should offset at least 50% of the supplemental energy needed, the balance shall come from natural gas. Electric resistance heating is not permitted.
311.2.3 Snowmelt energy consumption shall be calculated as in Section 307.1.3.
311.2.4 Outdoor pool and spas shall have their energy consumption calculated as in Section 305.12
311.2.5 The REMP option for supplemental energy is capped at 100,000,000 British Thermal Units (BTU) per year or a total fee of $100,000, whichever is greater.
311.2.6 REMP fees for snowmelt, spas, or pools shall be calculated according to the following equation: [(Supplemental Energy in BTUs per year) 3412BTU/kWh]*20 years* $0.07/kWh
311.2.7 Residences using REMP for supplemental energy must use the performance method see Sec 307. Minimum standards for the performance calculations are listed in Section 305 under the mandatory requirements with the following exceptions:
Wall Insulation R-22 Roof Insulation R-38 Floor Insulation R-19 Boiler Efficiency 87% Fenestration U=0.40
311.2.8 The following examples are illustrated for residences using the REMP option for snowmelt, spas, and/or pools. These residences that did not have BTU's available from the performance method calculations and are using an 87% efficient boiler.
Snowmelt Example (Snowmelt requested 500 sq. ft.)
(34,425(BTU per sq. ft. per year) /.87 (efficiency rating of boiler))*500 (snowmelt area) = 19,784,482 (BTU/yr)/3412 (kWh per BTU) = 5798.5 (kWh/yr)* 20 (years)* .07/kWh = $8,117.90
REMP fee will be $8,117.90
Pool Example (Pool summer use only 600 sq. ft.)
(29000(BTU per sq. ft. per year)/.87 (efficiency rating of boiler))*600 (pool area) = 20,000,000 (BTU/yr)/3412 (kWh per BTU) = 5861.66 (kWh/yr)* 20(years)* .07/kWh = $8,206.00
REMP fee will be $8,206.00
Pool Example (Pool year around outdoor use 600 sq. ft.)
(332000(BTU per sq. ft. per year) / .87 (efficiency rating of boiler))*600 (pool area) = 228,965,520 (BTU/yr) / 3412 (kWh per BTU) = 67,105.95 (kWh/yr)* 20 (years)*.07/kWh = $93,948.00
REMP fee will be $93,948.00
Spa Example (Spa 100 sq. ft. year around use)
(430000(BTU per sq. ft. per year) / .87 (efficiency rating of boiler))* 100 (spa area) = 49,425,287 (BTU/yr) / 3412 (kWh per BTU) = 14,485.72 (kWh/yr)* 20 (years)* .07/kWh = $20,280.00
REMP fee will be $20,280.00
311.3 Renewable Energy Mitigation Program (REMP) for houses over 5,000 sq. ft. A new home or remodel over 5000 sq. ft. is required to offset a small portion of their fossil fuel energy consumption through the use of on-site renewable energy or through a flat fee payment to REMP.
311.3.1 This requirement applies to all installations for which an application for a permit or renewal of an existing permit is filed or is by law required to be filed with or without an associated Building Permit.
311.3.2 The on-site renewable energy requirement can be met by the installation of a two-kilowatt photovoltaic or equivalent renewable energy system. This requirement can be alternatively handled off-site by payment of a REMP fee as follows:
over 5,000 sq. ft. $5,000.00 over 10,000 sq. ft. $10,000.00
SECTION 312 - RESIDENTIAL AND NONRESIDENTIAL REPAIRS
312.1 Scope. Repairs to building components, systems, or equipment which do not increase their pre-existing energy consumption need not comply with the APECC. If a building component, system, or piece of equipment is replaced, however, it must be treated as an alteration. (Ord. No. 55-1999 § 2 (part))
