Dimensions Guide

6
BLOWER PERFORMANCE - KG7SK
*SK - DOWNFLOW FURNACES - 80+ AFUE
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
SK054C-23A
(54,000)
High* 1,375 29 1,340 30 1,300 31 1,270 31 1,225 33 1,175 34 1,115 36 1,035 39
Med-High 1,155 35 1,130 35 1,110 36 1,085 37 1,055 38 1,015 39 975 41 910 44
Med-Low** 790 51 775 52 765 52 750 53 730 55 700 57 665 60 610 66
Low 650 62 640 63 630 63 610 66 590 68 565 71 530 75 480 83
SK072C-24B
(72,000)
High* 1,675 32 1655 32 1640 33 1620 33 1590 34 1560 35 1520 35 1475 36
Med-High 1,330 40 1315 41 1300 41 1280 42 1255 42 1230 44 1200 44 1150 46
Med-Low** 1,180 45 1165 46 1150 46 1135 47 1115 48 1090 50 1060 50 1010 53
Low 940 57 925 58 900 59 880 61 850 63 825 65 795 67 760 70
SK090C-24B
(90,000)
High* 1,610 41 1590 42 1575 42 1560 43 1540 43 1495 46 1460 46 1415 47
Med-High 1,295 51 1275 52 1260 53 1250 53 1220 55 1195 57 1170 57 1120 60
Med-Low** 1,155 58 1235 54 1115 60 1095 61 1065 63 1040 66 1015 66 980 68
Low 910 73 885 75 860 78 835 80 810 82 785 85 765 87 735 91
SK108C-35C
(108,000)
High* 2,395 33 2,335 34 2,285 35 2,230 36 2,200 36 2,140 37 2,080 38 2,000 40
Med-High 2,190 37 2,135 37 2,115 38 2,080 38 2,030 39 1,975 41 1,915 42 1,810 44
Med-Low** 1,785 45 1,770 45 1,740 46 1,725 46 1,685 47 1,645 49 1,615 50 1,565 51
Low 1,145 70 1,110 72 1,070 75 1,035 77 1,000 80 950 84 905 88 835 96
SK126C-45D
(126,000)
High* 2,445 38 2,395 39 2,385 39 2,330 40 2,275 41 2,225 42 2,130 44 2,015 46
Med-High 2,195 43 2,170 43 2,140 44 2,120 44 2,090 45 2,030 46 1,975 47 1,855 50
Med-Low** 1,795 52 1,780 52 1,770 53 1,760 53 1,725 54 1,690 55 1,655 56 1,610 58
Low 1,480 63 1,475 63 1,450 64 1,440 65 1,440 65 1,415 66 1,405 66 1,375 68
NOTES:
*FactorySetCoolingSpeed
**FactorySetHeatingSpeed
1.Temperaturerisesinthetableareapproximate.Actualtemperaturerisesmayvary.
2.Temperaturerisesshadedgrayareforreferenceonly.Theseconditionsarenotrecommended.
Table 4. Maximum Airflow & Temperature Rises (° F) - Downflow Furnaces