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WINTER POINT MULTIPLIERS (WPM) CLIMATE ZONES _4 5 6 6A-10 WINTER OVERHANG FACTORS (WOFI J OH RATIO .00-.11 I .12-.17 .18-.26 I .27-.35 I .36-.46 I .47-.57 I .58-.70 .71-.83 .84-1.1 8 T 1.19-1.72 1.73-2.73 I 2.74+ SINGLE PANE GLASS N 1.00 1.03 1.05 1.08 1.10 1.13 1.15 1.18 1.20 1.24 1.29 1.34 NE/NW 1.00 1.07 1.10 1.15 1.20 1.25 1.30 1.35 1.39 1.50 1.59 1.67 E!W 1.00 .71 .57 .19 -.20 -.65 -1.05 -1.48 -2.03 -3.01 -4.06 -5.04 SE/SW 1.00 .93 .90 .80 .68 .54 .39 .22 .05 -.33 -.71 -1.01 t;a:: S 1.00 .95 .92 .83 .70 .54 .36 .13 -.13 -.70 -.98 -1.09 ~[ DOUBLE PANE GLASS N 1.00 1.05 1.07 1.11 1.14 1.18 1.21 1.24 1.28 1.34 1.40 1.47 NE/NW 1.00 1.11 1.16 1.24 1.32 1.41 1.48 1.56 1.63 1.80 1.94 2.08 E!W 1.00 .88 .82 .66 .50 .31 .15 -.03 -.26 -.66 -1.10 -1.50 SE/SW 1.00 .95 .92 .85 .76 .65 .54 .41 .28 -.01 -.30 -.52 S 1.00 .96 .94 .87 .78 .65 .51 .33 .13 -.30 -.51 -.60 OH LENGTH' Oft 1 ft. 1 % ft. 2 ft. 3ft. 3'1, ft. 4% ft. 5% ft. 6% ft. 9'1, ft. 14ft. 20ft.+ "TO SELECT BY OVERHANG LENGTH, NO PART OF GLASS SHALL BE MORE THAN 8 FT. BELOW THE OVERHANG. 6A-11 WALL WINTER POINT MULTIPLIERS WPM FRAME R.VALUE 0-6.9 7-10.9 11-12.9 13-18.9 19-25.9 26& U WOOD EXT ADJ 6.8 5.3 2.5 2.1 2.0 1.8 1.8 1.6 1.1 1.0 .7 .7 STEEL EXT ADJ 9.4 6.7 4.4 3.3 3.3 2.6 3.0 2.4 2.6 2.2 1.4 1.2 CONCRETE BLOCK' INT. INSULATION NORMAL WT. EXT ADJ 6.0 3.1 3.8 2.3 2.9 1.9 2.3 1.5 1.5 1.1 .8 .7 .5 .5 XT. INSU NOR. WT. EXT 6.0 2.8 2.0 1.5 .8 LOG 6A-12 DOOR WINTER POINT MULTIPLIERS rw DOOR TYPE EXTERIOR ADJACENT WOOD 7.6 5.9 INSULATED 5.1 4.0 PM) 6A-13 CEILING WINTER POINT MULTIPLIERS (WPMl UNDER ATTIC SINGLE ASSEMBLY CONCRETE DECK ROOF R.VALUE WPM R-VALUE WPM CEILING TYPE 19-21.9 1.0 10-10.9 1.8 R-VALUE DROPPED EXPOSED 22-25.9 .9 11-12.9 1.6 10-13.9 1.2 1.3 26-29.9 .7 13-18.9 1.5 14-20.9 .7 .7 30-37.9 .6 19-25.9 1.1 21 & Un .4 .3 38 & Un .4 26-29.9 .6 "lnJ!.lln 4 6A-14 FLOOR WINTER POINT MULTIPLIERS WPM SLAB-ON-GRADE RAISED EDGE INSULATION CONCRETE WPM WPM 2.5 4.0 -1.7 1.8 -2.4 1.1 RAISED WOOD' POST OR PIER STEM WALL wi UNDER CONSTRUCTION FLOOR INSULATION WPM WPM 7.9 1.8 ~1 .7 1.5 .5 ADJACENT WPM 5.3 2.1 1.8 6A-16 DUCT MULTIPLIERS (DMl RETURN DUCTS RETURN DUCTS R-VALUE IN UNCONDITIONED SPACE IN CONDITIONED SPACE SUPPLY DUCTS IN 4.2-5.9 1.14 1.10 UNCONDITIONED SPACE 6.0-6.6 1.10 1.07 6.7 & Un 1.09 1.06 SUPPLY DUCTSIN 4.2-5.9 1.10 1.00 CONDITIONED SPACE' 6.0-6.6 1.07 1.00 I; 7 J!.lln 1M 1 nn 6A-17 HEATING SYSTEM MULTIPLIERS (HSMI SYSTEM TYPE HEATING SYSTEM MULTIPLlERS/HSMl Central Heat HSPF 6.40-6.79 6.80-6.89 6.90-7.39 7.40-7.89 7.90-8.39 8.40-8.89 8.9-9.39 9.4-9.89 Pump Units HSM .53 .50 .49 .46 .43 .41 .38 .36 HSPF 9.90-10.39 10.40-10.89 10.90-11.39 11.40-11.89 11.90-12.39 12.40 & uo HSM .34 .33 .31 .30 .29 .28 PTHP COP 2.50-2.69 2.70-2.89 2.90-3.09 3.10-3.29 3.30-3.49 3.50-3.69 3.70-3.89 3.90-4.19 HSM .40 .37 .34 .32 .30 .29 .27 .26 Electric Strin 1.0 Gas & LP Gas 1.0 (See Table 6A-1 8 for Credit Multiolierl MINIMUMS: CENTRAL UNITS-AIR SOURCE SPLIT SYSTEM 6.8 HSPF, SINGLE PKG. 6.6 HSPF, WATER SOURCE 3.8 COP, GROUND WATER SOURCE 3.4 COP, PTHP SEE TABLES 6-6 TO 6-8. 6A-15 INFILTRATION WINTER POINT MULTIPLIERS (WPM) INFILTRATION PRACTICE WPM SEE TABLE 6A.21 PRACTICE #1 6.2 PRACTICE #2 4.1 , FOR MULTIPLIERS FOR OTHER TYPES OF CONCRETE BLOCK CONSTRUCTION SEE SECTION 2.1 OF APPENDIX C. 2 MULTIPLIERS FOR OTHER TYPES OF RAISED WOOD ASSEMBLIES SEE SECTION 3.1 OF APPENDIX C. 3 DUCTS IN CONDITIONED SPACE NEED TO BE INSULATED ONLY TO THE R.VALUE NECESSARY TO PREVENT CONDENSATION. -5-