2006 INTERNATIONAL ENERGY CONSERVATION CODE ...

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RESIDENTIAL ENERGY EFFICIENCY TABLE 404.5.2(1) SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS BUILDING COMPONENT Above-grade walls Basement and crawlspace walls Above-grade floors Ceilings Roofs Attics Foundations Doors Glazing" Skylights Thermally isolated sunroorns STANDARD REFERENCE DESIGN Type: mass wall if proposed wall is mass: otherwise wood frame Gross area: same as proposed U-Factor: from Table 402.1.3 Solar absorptance = 0.75 Emittance = 0.90 _ _~--- ---~---_ ~- .._-~--- Type: same as proposed Gross area: same as proposed U-Factor: from Table 402.1.3 with insulation layer on interior side of walls Type: wood frame Gross area: same as proposed V-Factor: from Table 402.1.3 Type: wood frame Gross area: same as proposed V-Factor: from Table 402.].3 Type: composition shingle on wood sheathing Gross area: same as proposed Solar absorptance ~~ 0.75 Emittance ~ 0.90 Type: vented with aperture = 1 tt 2 per 300 ft 2 ceiling area Type: same as proposed ----- ._.-.__.._-------_. --._---.----- Area: 40 ft 2 Orientation: North U-factor: same as fenestration from Table 402.1.3 Total area" = The proposed glazing area; where the proposed glazing area is less than 18'Yc, of the conditioned floor area 18% of the conditioned floor area; where the proposed glazing area is 18'% or more of the conditioned floor area Orientation: equally distributed to four cardinal compass orientations (N. E. S, & W) LJ-factor: from Table 402.1.2 SHGC: From Table 402.1 except that for climates with no requirement (NR) SHGC = 0040 shall be used Interior shade fraction: Summer (all hours when cooling is required) = 0.70 Winter (all hours when heating is required) '- 0.85 External shading: none -------- .. _-,,- None None (coil/inlied) PROPOSED DESIGN As proposed As proposed As proposed As proposed A,:]J~()pose_cl_ As proposed As proposed As proposed As proposed As proposed As proposed _.._---- - .-- ----_.... As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed Same as standard reference design" As proposed As proposed As proposed 24 2006 INTERNATIONAL ENERGY CONSERVATION CODE~
RESIDENTIAL ENERGY EFFICIENCY TABLE 404.5.2(1) SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS-continued BUILDING COMPONENT STANDARD REFERENCE DESIGN PROPOSED DESIGN Air exchange rate Mechanical ventilation Internal gains Specific Leakage Area (SLAyl = 0.00036 assuming no For residences that are not tested, the same as the energy recovery standard reference design For residences without mechanical ventilation that arc tested in accordance with ASHRAE 119, Section 5. I, the measured air exchange rate" but not less than 0.35 ACH For residences with mechanical ventilation that arc tested in accordance with ASH RAE I J9, Section 5.1, the measured air exchange rate" combined with the mechanical ventilation rate. f which shall not be less than OJ)] x CFA + 7.5 x (Nf,,+I) where: CFA = conditioned floor area N"r = number of bedrooms - ----------- - ----- -------------,----------------- None, except where mechanical ventilation is specified by the proposed design, in which case: Annual vent fan energy usc: kWh/yr = 0.03942 x CF4 + 29.565 x (N,,,'+ 1) where: eFA = conditioned floor area N;,,- = number of bedrooms IGain -~-17,900 + 23.8 x efA +4J04 X Ni; (Btu/day per dwelling unit) As proposed Same as standard reference design Intcrnal mass Structural mass Heating systems" j Cooling systems" i An internal mass for furniture and contents of 8 pounds per square foot of floor area For masonry floor slabs, 80% of floor area covered by R-2 carpet and pad, and 20'% of floor directly exposed to room air For masonry basement walls, as proposed, but with insulation required by Table 402.1.3 located on the interior side of the walls For other walls, for ceilings, floors, and interior walls, wood frame construction Fuel type: same as proposed design Efficiencies: Electric: air-source heat pump with prevailing federal minimum efficiency Nonelectric furnaces: natural gas furnace with prevailing federal minimum efficiency Nonelectric boilers: natural gas boiler with prevailing federal minimum efficiency Capacity: sized in accordance with Section M 140 1.3 of the International Residential Code Fuel type: Electric Efficiency: in accordance with prevailing federal minimum standards Capacity: sized in accordance with Section M 1401.3 of the lnternational Residential Code (continued) Same as standard reference design, plus any additional mass specifically designed as a thermal storage clement" but not integral to the building envelope or structure As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed As proposed 2006 INTERNATIONAL ENERGY CONSERVATION CODE '0 25
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