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WINTER POINT MULTIPLIERS (WPM) CLIMATE ZONES 4 5 6 6A.10 WINTER OVERHANG FACTORS /WOFl J OH RATIO 1 .00-.11 I .12-.17 1 .18-.26 .27-.35 1 .36-.46 I .47-.57 .58-.70 1 .71-.83 I .84-1.18 1.19-1,7211.73-2.73 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 l- S 1.00 .95 .92 .83 .70 .54 .36 .13 -.13 -.70 -.98 -1.09 (.)11: ~[ 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. 2ft. 3ft. 3% ft. 4'12 ft. 5'12 ft. 6% ft. 9% 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 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 R-V ALUE 0-6.9 7-10.9 11-12.9 13-18.9 19-25.9 26&U 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 BLOCK1 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 6A-12 DOOR WINTER POINT MULTIPLIERS 6A-13 CEILING WINTER POINT MULTIPLIERS (WPM) DOOR TYPE EXTERIOR ADJACENT UNDER ATTIC SINGLE ASSEMBLY CONCRETE DECK ROOF R-V ALUE WPM R-V ALUE WPM CEILING TYPE WOOD 7.6 5.9 19-21.9 1.0 10-10.9 1.8 R-V ALUE DROPPED EXPOSED 22-25.9 .9 11-12.9 1.6 10-13.9 1.2 1.3 INSULATED 5.1 4.0 26-29.9 .7 13-18.9 1,5 14-20.9 .7 .7 30,37.9 .6 19-25.9 1.1 21 & Uo .4 .3 38 & Uo .4 26-29.9 .6 'lnR. Iln .4 6A-14 FLOOR WINTER POINT MULTIPLIERS (WPMl SLAB-ON-GRADE T RAISED UU. RAISED WOO[)2 EDGE INSULATION T. CONCRETE POST OR PIER STEM WALL wI UNDER ADJACENT Y CONSTRUCTION FLOOR INSULATION R-VALUE WPM R-VALUE WPM R-VALUE WPM WPM WPM 0-2.9 2.5 I 0-2.9 4.0 0-6.9 7.9 1.8 5.3 3-4.9 -1.7 3-4.9 1.8 in.. 7-10.9 2.1 .7 2,1 5-6.9 -2.4 5-6.9 1.1 11-18.9 1.5 .5 1.8 7 R. Iln -:?7 7 !I. Un II UU Hl!l.Un Q --, 1 n WPM) 6A-15 INFILTRATION WINTER POINT MULTIPLIERS (WPM) 6A-16 DUCT MULTIPLIERS IOMl INFILTRATION PRACTICE WPM RETURN DUCTS RETURN DUCTS ISEE TABLE 6A-21l R-V ALUE IN UNCONDITIONED SPACE IN CONDITIONED SPACE PRACTICE #1 6.2 SUPPLY DUCTS IN 4,2-5.9 1.14 1.10 PRACTICE #2 4.1 6.0-6.6 1.10 1.07 -9 ? UNCONDITIONED SPACE 6.7 & UP 1.09 1.06 SUPPLY DUCTS IN 4.2-5.9 1.10 1.00 CONDITIONED SPACE' 6.0-6.6 1.07 1.00 R 7 !l.lln 1 nR 1 nn 6A-17 HEATING SYSTEM MULTIPLIERS IHSM\ SYSTEM TYPE HEATING SYSTEM MULTIPLIERS (HSM\ 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 & un 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 Strio 1.0 Gas & LP Gas 1.0 (See Table 6A-18 for Credit Multiolier) . 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. 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.