RESIDENTIAL ENERGY EFFICIENCY

Transcription

1 CHAPTER 4 RESIDENTIAL ENERGY EFFICIENCY SECTION 401 GENERAL Scope. This chapter applies to residential buildings Compliance. The project is deemed to be in compliance where the building official or other authority having jurisdiction shall be required to demonstrate to the state that a national, state or local energy efficiency program meets or exceeds the energy efficiency required by this code. Projects shall comply with one of the following: 1. Sections 401, through 402.5, and 403.1, , , , and through (mandatory provisions), and (prescriptive provisions); 2. Specific computer software, worksheets, compliance manuals and other similar materials that meet the intent of this code, such as REScheck, REM/Rate, and trade-off worksheets from the New Mexico energy conservation code residential applications manual; or 3. (Performance path to compliance.) A REScheck Compliance Certificate, a New Mexico 2009 IECC Annual Energy Use Report provided by a CID-approved HERS rater, or comparable process that shows a project performs 20 percent better than the 2006 IECC. Only the following mandatory provisions are required: Sections 403.8, 403.9, and Compliance may be demonstrated by use of the RESNET accreditation standard for sampling providers Certificate. A permanent certificate shall be posted on, in, or near the electrical distribution panel, or near the mechanical equipment. The certificate shall not cover or obstruct the visibility of the circuit directory label, service disconnect label or other required labels. The certificate shall be completed by the builder or registered design professional. The certificate shall list the predominant R-values of insulation installed in or on ceiling/roof, walls, foundation (slab, basement wall, crawlspace all and/or floor) and ducts outside conditioned spaces; U-factors for fenestration and the solar heat gain coefficient (SHGC) of fenestration. Where there is more than one value for each component, the certificate shall list the value covering the largest area. The certificate shall list the types and efficiencies of heating, cooling and service water heating equipment. Where a gas-fired unvented room heater, electric furnace, or baseboard electric heater is installed in the residence, the certificate shall list gas-fired unvented room heater, electric furnace or baseboard electric heater as appropriate. An efficiency shall not be listed for gas-fired unvented room heaters, electric furnaces or electric baseboard heaters. SECTION 402 BUILDING THERMAL ENVELOPE General (Prescriptive) Insulation and fenestration criteria. The building thermal envelope shall meet the requirements of Table based on the climate zone specified in Chapter R-value computation. Insulation material used in layers, such as framing cavity insulation and insulating sheathing, shall be summed to compute the component R-value. The manufacturer s settled R-value shall be used for blown insulation. Computed R-values shall not include an R-value for other building materials or air films U-factor alternative. An assembly with a U-factor equal to or less than that specified in Table shall be permitted as an alternative to the R-value in Table Total UA alternative. If the total building thermal envelope UA (sum of U-factor times assembly area) is less than or equal to the total UA resulting from using the U-factors in Table (multiplied by the same assembly area as in the proposed building), the building shall be considered in compliance with Table The UA calculation shall be done using a method consistent with the ASHRAE Handbook of Fundamentals and shall include the thermal bridging effects of framing materials. The SHGC requirements shall be met in addition to UA compliance Specific insulation requirements (Prescriptive) Ceilings with attic spaces. When Section would require R-38 in the ceiling, R-30 shall be deemed to satisfy the requirement for R-38 wherever the full height of uncompressed R-30 insulation extends over the wall top plate at the eaves. Similarly, R-38 shall be deemed to satisfy the requirement for R-49 wherever the full height of uncompressed R-38 insulation extends over the wall top plate at the eaves. This reduction shall not apply to the U-factor alternative approach in Section and the total UA alternative in Section Ceilings without attic spaces. Where Section would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space for the required insulation, the minimum required insulation for such roof/ceiling assemblies shall be R-30. This reduction of insulation from the requirements of Section shall be limited to 500 square feet (46 m 2 )or20 percent of the total insulated ceiling area, whichever is less. This reduction shall not apply to the U-factor alternative approach in Section and the total UA alternative in Section NEW MEXICO ENERGY CONSERVATION CODE 29

2 CLIMATE ZONE FENESTRATION b, l SKYLIGHT b TABLE INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT a GLAZED FENESTRATION CEILING b, g, k SHGC m, n, o R-VALUE WOOD FRAME WALL R-VALUE MASS WALL R-VALUE i FLOOR R-VALUE BASEMENT WALL R-VALUE c SLAB R-VALUE & DEPTH d CRAWL SPACE WALL R-VALUE c / j / j or 13+5 h 5/8 19 5/13 f 0 5/13 4 except or 13+5 Marine h 8/ /13 10, 2 ft 10/13 5 and Marine 4 o 20 or 13+5 h 13/17 30 g 10/13 10, 2 ft 10/ NR or 13+5 h 15/20 30 g 15/19 10, 4 ft 10/13 7 and NR /21 38 g 15/19 10, 4 ft 10/13 For SI: 1 foot = mm. a. R-values are minimums. U-factors and SHGC are maximums. R-19 batts compressed into a nominal 2 6 framing cavity such that the R-value is reduced by R-1 or more shall be marked with the compressed batt R-value in addition to the full thickness R-value. b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. c. 15/19 means R-15 continuous insulation on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. 15/19 shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the home. 10/13 means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall. d. R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Zones 1 through 3 for heated slabs. e. There are no SHGC requirements in the Marine Zone. f. Basement wall insulation is not required in warm-humid locations as defined by Table g. Or insulation sufficient to fill the framing cavity, R-19 minimum. h. First value is cavity insulation, second is continuous insulation, so means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers 25 percent or less of the exterior, insulating sheathing is not required in the locations where structural sheathing is used. If structural sheathing covers more than 25 percent of exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-2. i. The second R-value applies when more than half the insulation is on the interior of the mass wall. j. For impact rated fenestration in wind-borne debris regions, the maximum U-factor shall be 0.75 in zone 2 and 0.65 in zone 3. k. The SHGC may be waived when the glazing orientation is part of a passive solar glazing application. l. A fenestration U-factor of 0.37 shall be equivalent to the 0.35 requirement for glazing in all climate zones above 5,000 ft. elevation m.when air impermeable insulation is used to create an un-vented attic assembly in accordance with Sec. R806.4, at least R-23 cavity insulation and R-10 continuous insulation surrounding all framing members shall be deemed to satisfy the requirement for R-38 ceilings. n. In all locations with heating degree days (HDD) exceeding 6000: When air impermeable insulation is used to create an un-vented attic assembly in accordance with Sec. R806.4, at least R-30 cavity insulation and R-17 continuous insulation surrounding all framing members shall be deemed to satisfy the requirement for R-49 ceilings. o. In locations with HDD less than 6000, R-38 shall be deemed to satisfy this requirement. TABLE EQUIVALENT S a CLIMATE ZONE FENESTRATION SKYLIGHT CEILING FRAME WALL MASS WALL MASS b WALL FLOOR BASEMENT WALL CRAWL SPACE WALL c d , Equivalent U-Factors a a. Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source. b. When more than half the insulation is on the interior c. Except Marine d. And Marine NEW MEXICO ENERGY CONSERVATION CODE

3 Access hatches and doors. Access doors from conditioned spaces to unconditioned spaces (e.g., attics and crawl spaces) shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces. Access shall be provided to all equipment that prevents damaging or compressing the insulation. A wood framed or equivalent baffle or retainer is required to be provided when loose fill insulation is installed, the purpose of which is to prevent the loose fill insulation from spilling into the living space when the attic access is opened, and to provide a permanent means of maintaining the installed R-value of the loose fill insulation. Exception: Access need not be provided where only ductwork is present in the attic, unless otherwise required Mass walls. Mass walls for the purposes of this chapter shall be considered above-grade walls of concrete block, concrete, insulated concrete form (ICF), masonry cavity, brick (other than brick veneer), earth (adobe, compressed earth block, rammed earth) and solid timber/logs Steel-frame ceilings, walls, and floors. Steelframe ceilings, walls and floors shall meet the insulation requirements of Table or shall meet the U-factor requirements in Table The calculation of the U-factor for a steel-frame envelope assembly shall use a seriesparallel path calculation method. Exception: In Climate Zones 1 and 2, the continuous insulation requirements in Table shall be permitted to be reduced to R-3 for steel frame wall assemblies with studs spaced at 24 inches (610 mm) on center. TABLE STEEL-FRAME CEILING, WALL AND FLOOR INSULATION (R-VALUE) WOOD FRAME R-VALUE REQUIREMENT COLD-FORMED STEEL EQUIVALENT R-VALUE a Steel Truss Ceilings b R-30 R-38 or R or R R-38 R-49 or R R-49 R Steel Joist Ceilings b R-30 R-38 in 2 4 or 2 6 or 2 8 R-49 in any framing R-38 R-49 in 2 4 or 2 6 or 2 8 or 2 10 Steel-Framed Wall R-13 R or R or R or R R-19 R or R or R R-21 R or R or R R-13 R-19 Steel Joist Floor R-19 in 2 6 R in 2 8 or 2 10 R in 2 6 R in 2 8 or 2 10 a. Cavity insulation R-value is listed first, followed by continuous insulation R-value. b. Insulation exceeding the height of the framing shall cover the framing Floors. The following requirements apply to new floors and to existing un-insulated floors, including abovegarage and cantilevered floors Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking Batt and blown insulation shall be held in place by mechanical attachments The manufacturer s published installation instructions for in-floor heating shall be followed Basement walls. Walls associated with conditioned basements shall be insulated from the top of the basement wall down to 10 feet (3048 mm) below grade or to the basement floor, whichever is less. Walls associated with unconditioned basements shall meet this requirement unless the floor overhead is insulated in accordance with Sections and Slab-on-grade floors. Slab-on-grade floors with a floor surface less than 12 inches (305 mm) below grade shall be insulated in accordance with Table The insulation shall extend downward from the top of the slab on the outside or inside of the foundation wall. Insulation located below grade shall be extended the distance provided in Table by any combination of vertical insulation, insulation extending under the slab or insulation extending out from the building. Insulation extending away from the building shall be protected by pavement or by a minimum of 10 inches (254 mm) of soil. The top edge of the insulation installed between the exterior wall and the edge of the interior slab shall be permitted to be cut at a 45-degree (0.79 rad) angle away from the exterior wall. Slab-edge insulation is not required in jurisdictions designated by the code official as having a very heavy termite infestation. Monolithic foundations shall be formed in place or insulation used as a forming material shall be adequately supported to resist movement Exception. For slab-on-grade installations, the placement of vertical perimeter insulation shall not be required to penetrate the top four inches of the slab at door thresholds or between unheated garages, storage or mechanical areas, and heated living spaces. The required depth and placement of perimeter insulation shall not be required to a depth that exceeds that of the top of the spread footing or the bottom of the monolithically-poured footing as determined for frost protection Slab-on-grade sill plate sealer. The space between the foundation and the bottom plate shall be sealed to limit infiltration by one of the following methods: application of a sill sealer that will expand and contract, or other equivalent material, between the foundation and the bottom plate; or application of caulk, or other equivalent material, to seal the bottom plate of exterior walls Crawl space walls. As an alternative to insulating floors over crawl spaces, crawl space walls shall be permitted to be insulated when the crawl space is not vented to the outside. Crawl space wall insulation shall be permanently fastened to the wall and extend downward from the floor to 2009 NEW MEXICO ENERGY CONSERVATION CODE 31

4 the finished grade level and then vertically and/or horizontally for at least an additional 24 inches (610 mm). Exposed earth in unvented crawl space foundations shall be covered with a continuous Class I vapor retarder in accordance with the International Building Code. All joints of the vapor retarder shall overlap by 6 inches (153 mm) and be sealed or taped. The edges of the vapor retarder shall extend at least 6 inches (153 mm) up the stem wall and shall be attached to the stem wall Masonry veneer. Insulation shall not be required on the horizontal portion of the foundation that supports a masonry veneer Thermally isolated sunroom insulation. The minimum ceiling insulation R-values shall be R-19 in Zones 1 through 4 and R-24 in Zones 5 through 8. The minimum wall R-value shall be R-13 in all zones. New wall(s) separating a sunroom from conditioned space shall meet the building thermal envelope requirements Band joist/rim joists and corners. Bandrim joists and corners shall be insulated to the same level as exterior walls as required for wood frame wall R-values in Table and must include an air barrier Skylight shafts and knee walls. Skylight shafts and knee walls shall be insulated to the same level as the exterior walls as required for wood frame wall R-values in Table Architectural features. Code required building envelope insulation and air sealing for exterior architectural features such as stairs and decks shall be continuous Insulation installation requirements. Insulation shall be installed as follows: 1. Insulation shall be installed according to manufacturer s published installation instructions; 2. Wall insulation shall be enclosed on all six sides, and shall be in substantial contact with the sheathing material on at least one side (interior or exterior) of the cavity; 3. Insulation shall uniformly fill each cavity side-to-side and top-to-bottom, without substantial gaps or voids around obstructions (such as blocking or bridging); 4. Exterior rigid insulation shall be in firm contact with the structural sheathing materials, and shall be tightly fitted at joints; 5. Cavity insulation shall be split, installed, and fitted tightly around wiring and other services; 6. Exterior sheathing shall not be visible from the interior through gaps in the cavity insulation Fenestration. (Prescriptive) U-factor. An area-weighted average of fenestration products shall be permitted to satisfy the U-factor requirements Glazed fenestration SHGC. An area-weighted average of fenestration products more than 50 percent glazed shall be permitted to satisfy the SHGC requirements Glazed fenestration exemption. Up to 15 square feet (1.4 m 2 ) of glazed fenestration per dwelling unit shall be permitted to be exempt from U-factor and SHGC requirements in Section This exemption shall not apply to the U-factor alternative approach in Section and the Total UA alternative in Section Opaque door exemption. One side-hinged opaque door assembly up to 24 square feet (2.22 m 2 ) in area is exempted from the U-factor requirement in Section This exemption shall not apply to the U-factor alternative approach in Section and the total UA alternative in Section Thermally isolated sunroom U-factor. For Zones 4 through 8, the maximum fenestration U-factor shall be 0.50 and the maximum skylight U-factor shall be New windows and doors separating the sunroom from conditioned space shall meet the building thermal envelope requirements Replacement fenestration. Where some or all of an existing fenestration unit is replaced with a new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor and SHGC in Table Glazing-to-opaque wall area ratio. The ratio of glazing to opaque wall area shall not exceed 18 percent. Exception: When the ratio of glazing to opaque wall area exceeds 18 percent, compliance shall be demonstrated by using the calculation methods in the residential applications manual trade-off worksheet, dated January 2011, as prepared by the state of New Mexico Energy, Minerals and Natural Resources Department Air leakage (Mandatory) Infiltration. The building thermal envelope on all new construction shall be durably sealed to limit infiltration. The sealing methods between dissimilar materials shall allow for differential expansion and contraction. The following shall be caulked, gasketed, weather stripped or otherwise sealed with an air barrier material, suitable film or solid material: all joints, seams and penetrations; site-built windows, doors and skylights; openings between windows and door assemblies and curb mounted skylights and their respective jambs and framing; utility penetrations; dropped ceilings separating a garage from conditioned spaces; behind tubs and showers on exterior walls; and other sources of infiltration Existing building openings in level III alterations. The existing building openings between conditioned and un-conditioned space must be fully sealed and insulated, and any remaining gaps must be sealed with caulk or foam. Where required, fire rated material shall be used Existing building doors and windows. Existing building openings between door and window assemblies and their respective jambs and framing shall be caulked, gasketed, weather stripped or otherwise sealed with an approved material NEW MEXICO ENERGY CONSERVATION CODE

5 Existing building skylight shaft insulation. Where access is available, all skylights shall be caulked, gasketed or weather stripped. Knee walls shall be insulated in compliance with table Air sealing and insulation. Building envelope air tightness and insulation installation shall be demonstrated to comply with one of the following options given by Section or : Testing option. Building envelope tightness and insulation installation shall be considered acceptable when tested air leakage is less than seven air changes per hour (ACH) when tested with a blower door at a pressure of 50 pascals (1 psf). Testing shall occur after rough in and after installation of penetrations of the building envelope, including penetrations for utilities, plumbing, electrical, ventilation and combustion appliances. During testing: 1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed; 2. Dampers shall be closed, but not sealed, including exhaust, intake, makeup air, backdraft and flue dampers; 3. Interior doors shall be open; 4. Exterior openings for continuous ventilation systems and heat recovery ventilators shall be closed and sealed; 5. Heating and cooling system(s) shall be turned off; 6. HVAC ducts shall not be sealed; and 7. Supply and return registers shall not be sealed. TABLE AIR BARRIER AND INSULATION INSPECTION COMPONENT CRITERIA COMPONENT Air barrier and thermal barrier Ceiling/attic Walls Windows and doors Rim joists Floors (including above-garage and cantilevered floors) Crawl space walls Shafts, penetrations Narrow cavities Garage separation Recessed lighting Plumbing and wiring Shower/tub on exterior wall Electrical/phone box on exterior walls Common wall HVAC register boots Fireplace CRITERIA Exterior thermal envelope insulation for framed walls is installed in substantial contact and continuous alignment with building envelope air barrier. Breaks or joints in the air barrier are filled or repaired. Air-permeable insulation is not used as a sealing material. Air-permeable insulation is inside of an air barrier and must fill the wall cavity. Air barrier in any dropped ceiling/soffit is substantially aligned with insulation and any gaps are sealed. Attic access (except unvented attic), knee wall door, or drop down stair is sealed. Corners and headers are insulated. Junction of foundation and sill plate is sealed. Space between window/door jambs and framing is sealed. Rim joists are insulated and include an air barrier. Insulation is installed to maintain permanent contact with underside of subfloor decking. Air barrier is installed at any exposed edge of insulation. Insulation is permanently attached to walls. Exposed earth in unvented crawl spaces is covered with Class I vapor retarder with overlapping joints taped. Duct shafts, utility penetrations, knee walls and flue shafts opening to exterior or unconditioned space are sealed. Batts in narrow cavities are cut to fit, or narrow cavities are filled by sprayed/blown insulation. Air sealing is provided between the garage and conditioned spaces. Recessed light fixtures are air tight, IC rated, and sealed to drywall. Exception fixtures in conditioned space. Insulation is placed between outside and pipes. Batt insulation is cut to fit around wiring and plumbing, or sprayed/blown insulation extends behind piping and wiring. Showers and tubs on exterior walls have insulation and an air barrier separating them from the exterior wall. Air barrier extends behind boxes or air sealed-type boxes are installed. Air barrier is installed in common wall between dwelling units. HVAC register boots that penetrate building envelope are sealed to subfloor or drywall. Fireplace walls include an air barrier NEW MEXICO ENERGY CONSERVATION CODE 33

6 Visual inspection option. Building envelope tightness and insulation installation shall be considered acceptable when the items listed in Table , applicable to the method of construction, are field verified. Where required by the code official, anapproved party independent from the installer of the insulation shall inspect the air barrier and insulation. Compliance with the State of New Mexico Thermal Bypass Inspection Checklist shall be required Fireplaces. New wood-burning fireplaces shall have gasketed doors and outdoor combustion air. Exception: Wood burning masonry fireplaces without a gas log igniter are allowed without gasketed doors providing: 1. The residence being constructed exceeds compliance of the energy code by 20 percent or better with compliance demonstrated by either section 401.2(2) or (3); and 2. The fireplaces have outdoor combustion air supplied directly to the fireboxes Fenestration air leakage. Windows, skylights and sliding glass doors shall have an air infiltration rate of no more than 0.3 cfm per square foot (1.5 L/s/m 2 ), and swinging doors no more than 0.5 cfm per square foot (2.6 L/s/m 2 ), when tested according to NFRC 400 or AAMA/WDMA/ CSA 101/I.S.2/A440 by an accredited, independent laboratory and listed and labeled by the manufacturer. Exceptions: Site-built windows, skylights and doors Recessed lighting. Recessed luminaires installed in the building thermal envelope shall be sealed to limit air leakage between conditioned and unconditioned spaces. All recessed luminaires shall be IC-rated and labeled as meeting ASTM E 283 when tested at 1.57 psf (75 Pa) pressure differential with no more than 2.0 cfm (0.944 L/s) of air movement from the conditioned space to the ceiling cavity. All recessed luminaires shall be sealed with a gasket or caulk between the housing and the interior wall or ceiling covering Maximum fenestration U-factor and SHGC (Mandatory). The area-weighted average maximum fenestration U-factor permitted using trade-offs from Section or 405 shall be 0.48 in Zones 4 and 5 and 0.40 in Zones 6 through 8 for vertical fenestration, and 0.75 in Zones 4 through 8 for skylights. The area-weighted average maximum fenestration SHGC permitted using trade-offs from Section 405 in Zones 1 through 3 shall be SECTION 403 SYSTEMS Controls (Mandatory). At least one thermostat shall be provided for each separate heating and cooling system Programmable thermostat. Where the primary heating system is a forced-air furnace, at least one thermostat per dwelling unit shall be capable of controlling the heating and cooling system on a daily schedule to maintain different temperature set points at different times of the day. This thermostat shall include the capability to set back or temporarily operate the system to maintain zone temperatures down to 55 F (13 C) or up to 85 F (29 C). The thermostat shall initially be programmed with a heating temperature set point no higher than 70 F (21 C) and a cooling temperature set point no lower than 78 F (26 C). Exceptions: 1. Where the home is registered in a performancebased certification program, the requirement for a programmable thermostat shall be waived; 2. Where approved alternative methods of construction and/or materials are being used, programmable thermostats may be omitted Heat pump supplementary heat (Mandatory). Heat pumps having supplementary electric-resistance heat shall have controls that, except during defrost, prevent supplemental heat operation when the heat pump compressor can meet the heating load Ducts Insulation. Ducts shall be insulated to the following levels. 1. Heating only ducts: a. Exterior: R-8; b. Ventilated attic: R-6; c. Unvented attic w/backloaded ceiling: R-6; d. Unvented attic w/roof insulation: R-6; e. Unconditioned space: R-6; f. Indirectly conditioned space: R-3.5; g. Buried: none. 2. Cooling only ducts: a. Exterior: R-8 or the R-factor of insulation in the exterior wall on which the duct is located; b. Ventilated Attic: R-6; c. Unvented attic w/backloaded ceiling: R-6; d. Unvented attic w/roof insulation: R-6; e. Unconditioned space: R-6; f. Indirectly conditioned space: R-3.5; g. Buried: none. 3. Combined heating and cooling ducts: a. Exterior: R-6; b. Ventilated attic: R-6; c. Unvented attic w/ backloaded ceiling: R-6; d. Unvented attic w/ roof insulation: R-6; e. Unconditioned space: R-6; f. Indirectly conditioned space: R-3.5; g. Buried: R NEW MEXICO ENERGY CONSERVATION CODE

7 THERMAL BYPASS 1. Overall Air Barrier and Thermal Barrier Alignment 2.Walls Adjoining Exterior Walls or Unconditioned Spaces 3. Floors between Conditioned and Exterior Spaces 4. Shafts 5. Attic/Ceiling Interface 6. Common Walls Between Dwelling Units STATE OF NEW MEXICO THERMAL BYPASS INSPECTION CHECKLIST Home Address: City: State: NM INSPECTION GUIDELINES CORRECTIONS NEEDED BUILDER VERIFIED RATER VERIFIED Insulation shall be installed in full contact with sealed interior and exterior air barrier except for alternate to interior air barrier under item no. 2 (Walls Adjoining Exterior Walls or Unconditioned Spaces) All Climate Zones: 1.1. Overall Alignment Throughout Home Y / N Y / N Y / N Y / N 1.2. Garage Band Joist Air Barrier (at bays adjoining conditioned space) Y / N Y / N Y / N Y / N 1.3. Attic Eave Baffles Where Vents/Leakage Exist Y / N Y / N Y / N Y / N Only at Climate Zones 4 and Higher: 1.4. Slab-edge Insulation (A maximum of 25% of the slab edge may be uninsulated in Climate Zones 4 and 5.) Y / N Y / N Y / N Y / N Best Practices Encouraged, Not Required.: 1.5. Air Barrier At All Band Joists (Climate Zones 4 and higher) Y / N Y / N Y / N Y / N 1.6. Minimize Thermal Bridging (e.g., OVE framing, SIPs, ICFs) Y / N Y / N Y / N Y / N Fully insulated wall aligned with air barrier at both interior and exterior, OR Alternate for Climate Zones 1 thru 3, sealed exterior air barrier aligned with RESNET Grade 1 insulation fully supported Continuous top and bottom plates or sealed blocking 2.1. Wall Behind Shower/Tub Y / N Y / N Y / N Y / N 2.2. Wall Behind Fireplace Y / N Y / N Y / N Y / N 2.3. Insulated Attic Slopes/Walls Y / N Y / N Y / N Y / N 2.4. Attic Knee Walls Y / N Y / N Y / N Y / N 2.5. Skylight Shaft Walls Y / N Y / N Y / N Y / N 2.6. Wall Adjoining Porch Roof Y / N Y / N Y / N Y / N 2.7. Staircase Walls Y / N Y / N Y / N Y / N 2.8. Double Walls Y / N Y / N Y / N Y / N Air barrier is installed at any exposed fibrous insulation edges Insulation is installed to maintain permanent contact with sub-floor above including necessary supports (e.g., staves for blankets, netting for blown-in) Blanket insulation is verified to have no gaps, voids or compression. Blown-in insulation is verified to have proper density with firm packing 3.1. Insulated Floor Above Garage Y / N Y / N Y / N Y / N 3.2. Cantilevered Floor Y / N Y / N Y / N Y / N Openings to unconditioned space are fully sealed with solid blocking or flashing and any remaining gaps are sealed with caulk or foam (provide fire-rated collars and caulking where required) 4.1. Duct Shaft Y / N Y / N Y / N Y / N 4.2. Piping Shaft/Penetrations Y / N Y / N Y / N Y / N 4.3. Flue Shaft Y / N Y / N Y / N Y / N All attic penetrations and dropped ceilings include a full interior air barrier aligned with insulation with any gaps fully sealed with caulk, foam or tape Movable insulation fits snugly in opening and air barrier is fully gasketed 5.1. Attic Access Panel (fully gasketed and insulated) Y / N Y / N Y / N Y / N 5.2. Attic Drop-down Stair (fully gasketed and insulated) Y / N Y / N Y / N Y / N 5.3. Dropped Ceiling/Soffit (full air barrier aligned with insulation) Y / N Y / N Y / N Y / N 5.4. Recessed Lighting Fixtures (ICAT labeled and sealed to drywall) Y / N Y / N Y / N Y / N 5.5. Whole-house Fan (insulated cover gasketed to the opening) Y / N Y / N Y / N Y / N Gap between drywall shaft wall (i.e., common wall) and the structural framing between units is fully sealed at all exterior boundary conditions 6.1. Common Wall Between Dwelling Units Y / N Y / N Y / N Y / N Home Energy Rating Provider: Rater Inspection Date: N/A Home Energy Rater Company Name: Home Energy Rater Signature: Builder Company Name: Builder Inspection Date: Builder Employee Signature: 2009 NEW MEXICO ENERGY CONSERVATION CODE 35

8 Sealing (Mandatory). All ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed. Joints, seams and penetrations of duct systems shall be made air-tight by means of mastics, gasketing, or other means in accordance with the mechanical code. Register penetrations shall be sealed to the wall or floor assemblies. Where HVAC duct penetrates a conditioned space, the duct penetration shall be sealed to the wall or floor assembly to prevent leakage into an unconditioned space. 1. Postconstruction test: Leakage to outdoors shall be less than or equal to 8 cfm (226.5 L/min) per 100 ft 2 (9.29 m 2 )ofconditioned floor area or a total leakage less than or equal to 12 cfm (12 L/min) per 100 ft 2 (9.29 m 2 )ofconditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including the manufacturer s air handler enclosure. All register boots shall be taped or otherwise sealed during the test. 2. Rough-in test: Total leakage shall be less than or equal to 6 cfm (169.9 L/min) per 100 ft 2 (9.29 m 2 )of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the roughed in system, including the manufacturer s air handler enclosure. All register boots shall be taped or otherwise sealed during the test. If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 4 cfm (113.3 L/min) per 100 ft 2 (9.29 m 2 ) of conditioned floor area. Exceptions: Duct tightness test is not required if the air handler and all ducts are located within conditioned space Building cavities (Mandatory). Building framing cavities shall not be used as supply ducts Installation of ducts. All HVAC ducts or duct systems shall be installed in accordance with the New Mexico Mechanical Code Chapters 6 and Materials. Materials for HVAC ducts or duct systems shall comply with the provisions set forth in Chapter 6 of the New Mexico Mechanical Code. Factory made ducts shall be installed in accordance with Chapter 6oftheNewMexico Mechanical Code and UMC Standard 6-5. The use of flexible duct shall be limited to supply- and return-air run-outs of not more than 12 feet in length. Flexible duct shall not be used for the principle supply- and return-air plenum Piping insulation (mandatory). All plumbing and mechanical hot water piping systems shall be insulated to a minimum R-2. A means of manual disconnect must be installed on all circulating pumps Circulating hot water systems (Mandatory). Deleted Mechanical ventilation (Mandatory). Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the ventilation system is not operating Equipment sizing (mandatory). Heating and cooling equipment shall be sized in accordance with Chapter 9 of the New Mexico Mechanical Code, Section 902.0, and Chapter 17 of the New Mexico Mechanical Code, Standards Table 17-1, Standards for Equipment and Materials. The calculations used to determine the equipment size for the residence must be included with the submittal documents and approved by the Authority Having Jurisdiction Systems serving multiple dwelling units (mandatory). In lieu of Section 403, systems serving multiple dwelling units as defined in the New Mexico Residential Building Code shall comply with Sections 503 and 504 of this code and Chapters 6 (Duct Systems), and 17 (Mandatory Referenced Standards) of the 2009 New Mexico Mechanical Code. The calculations used to determine the equipment size for the residence must be included with the submittal documents and approved by the Authority Having Jurisdiction Snow melt system controls (Mandatory). Snow- and ice-melting systems, supplied through energy service to the building, shall include automatic controls capable of shutting off the system when the pavement temperature is above 50 F, and no precipitation is falling and an automatic or manual control that will allow shutoff when the outdoor temperature is above 40 F Pools (Mandatory). Pools shall be provided with energy-conserving measures in accordance with Sections through Pool heaters. All pool heaters shall be equipped with a readily accessible on-off switch to allow shutting off the heater without adjusting the thermostat setting. Pool heaters fired by natural gas or LPG shall not have continuously burning pilot lights Time switches. Time switches that can automatically turn off and on heaters and pumps according to a preset schedule shall be installed on swimming pool heaters and pumps. Exceptions: 1. Where public health standards require 24-hour pump operation. 2. Where pumps are required to operate solar- and waste-heat-recovery pool heating systems Pool covers. Heated pools shall be equipped with a vapor-retardant pool cover on or at the water surface. Pools heated to more than 90 F (32 C) shall have a pool cover with a minimum insulation value of R-12. Exception: Pools deriving over 60 percent of the energy for heating from site-recovered energy or solar energy source Fans. Ventilating fans shall meet ENERGY STAR requirements. Exception: Ventilating fans in half bathrooms that do not contain a bathtub, shower, spa, or similar source of moisture are exempt from the ENERGY STAR requirement NEW MEXICO ENERGY CONSERVATION CODE

9 SECTION 404 ELECTRICAL POWER AND LIGHTING SYSTEMS Lighting equipment (mandatory). A minimum of 75 percent of the lamps in permanently installed lighting fixtures shall be high-efficacy lamps or 50 percent of the permanently installed luminaires (lighting fixtures) shall be ENERGY STAR qualified Lighting equipment (mandatory). On one and two family dwelling units, in addition to a wall switch, motion sensors, daylight sensors, and timers shall be installed on at least 33% of the outdoor luminaries (light fixtures) Photovoltaic raceway. On new construction in one and two family dwelling units a listed, non-flexible 3 / 4 inch minimum metallic electrical raceway shall be installed during rough-in from an accessible point in the garage or indoor designated solar photovoltaic equipment location to: 1. The roof for roof mounted photovoltaic equipment; or 2. An outside wall for remote mounted photovoltaic equipment. The conduit shall be sealed with a listed fitting or box at each end. SECTION 405 SIMULATED PERFORMANCE ALTERNATIVE (Performance) Deleted SECTION 406 EXISTING RESIDENTIAL BUILDINGS The following shall apply in residences where additions or alterations are made and any of the following are encountered: 1. The reconfiguration of space; 2. The addition or elimination of any door or window; or 3. The work area in the existing building exceeds 50 percent of the original aggregate floor space Thermal envelope. Exposed openings to conditioned space in the existing building shall be fully sealed and insulated and any remaining gaps sealed with caulk or foam. Where required, fire rated material shall be used Openings. Exposed openings in the existing building between conditioned and unconditioned spaces, including those in cabinets or closets, shall be fully sealed and insulated, and any remaining gaps shall be sealed with approved materials. Where required, fire rated material shall be used Doors and windows. Openings between all exterior door and window assemblies and their respective jambs and framing shall be caulked, gasketed, weather-stripped or otherwise sealed with an approved material Skylight shaft insulation. Where access exists, all skylights shall be caulked, gasketed, or weather-stripped with an approved material. Knee walls shall be insulated to comply with Table Under floor insulation. Where access exists, insulate existing uninsulated floors (including floors above garages and cantilevered floors) in accordance with the following: 1. Insulation shall be installed to maintain permanent contact with the underside of the sub-floor decking. 2. Batt and blown insulation shall be held in place by mechanical attachment. 3. Batt insulation shall be installed in accordance with manufacturers specifications. 4. Manufacturers published installation instructions for in-floor heating shall be followed Duct sealing and insulation. Where access exists, compliance with applicable Sections of through is required Programmable thermostat. Reasonable measures shall be taken for retrofitting all existing non-programmable thermostats. Where the primary heating system is a forced-air furnace, at least one thermostat per dwelling unit shall be capable of controlling the heating and cooling system on a daily schedule to maintain different temperature set points at different times of the day. This thermostat shall include the capability to set back or temporarily operate the system to maintain zone temperatures down to 55 F (13 C) or up to 85 F (29 C). The thermostat shall initially be programmed with a heating temperature set point no higher than 70 F (21 C) and a cooling temperature set point no lower than 78 F (26 C). Exceptions: 1. Where the home is registered in a performance-based certification program the requirement for a programmable thermostat shall be waived; 2. Where approved alternative methods of construction and materials are being used, programmable thermostats may be omitted NEW MEXICO ENERGY CONSERVATION CODE 37

10 NEW MEXICO ENERGY CONSERVATION CODE