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Table 5. *SL - 92.1% AFUE, Single Stage, Downfl ow Gas Furnace
DOWNFLOW GAS FURNACES
Model
Number
Heating
Input
(Btuh)
Motor
Speed
External Static Pressure (Inches Water Column)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
SL054-24B
54,000
HIGH* 1,580 29 1,550 30 1,520 30 1,485 31 1,460 32 1,425 32 1,375 33 1,320 35
MED-HIGH 1,240 37 1,230 37 1,210 38 1,185 39 1,165 39 1,135 41 1,100 42 1,045 44
MED-LOW** 1,145 40 1,120 41 1,100 42 1,080 43 1,055 44 1,030 45 985 47 940 49
LOW 895 51 870 53 850 54 825 56 800 58 770 60 740 62 715 64
SL072-24B
72,000
HIGH* 1,560 39 1,530 40 1,500 41 1,480 41 1,435 43 1,400 44 1,360 45 1,310 47
MED-HIGH** 1,245 49 1,225 50 1,205 51 1,180 52 1,150 53 1,125 55 1,090 56 1,045 59
MED-LOW 1,085 57 1,070 57 1,045 59 1,025 60 1,000 61 970 63 930 66 880 70
LOW 850 72 830 74 800 77 780 79 760 81 730 84 710 86 685 90
SL090-35C
90,000
HIGH* 1,955 39 1,905 40 1,835 42 1,795 43 1,730 44 1,620 47 1,545 50 1,450 53
MED-HIGH** 1,845 42 1,790 43 1,750 44 1,680 46 1,515 51 1,540 50 1,475 52 1,410 54
MED-LOW 1,320 58 1,290 59 1,250 61 1,215 63 1,180 65 1,120 68 1,050 73 970 79
LOW 1,190 64 1,165 66 1,125 68 1,080 71 1,055 73 1,000 77 945 81 875 88
SL120-45D
120,000
HIGH* 2,215 46 2,150 48 2,075 49 2,035 50 1,970 52 1,905 54 1,800 57 1,745 59
MED-HIGH** 2,050 50 2,015 51 1,955 52 1,900 54 1,860 55 1,795 57 1,720 59 1,620 63
MED-LOW 1,720 59 1,690 60 1,655 62 1,640 62 1,610 63 1,560 66 1,505 68 1,465 70
LOW 1,420 72 1,410 72 1,400 73 1,365 75 1,350 76 1,335 77 1,290 79 1,260 81
NOTES:
* Factory Set Cooling Speed 1.
Temperature rises in the table are approximate. Actual temperature rises may vary
.
** Factory Set Heating Speed
2.
Temperature rises shaded in gray are for reference only. These conditions are not recommended.
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