Heat Controller 80+ AFUE Installation Instructions Manual page 29

Model Number
& Motor
Heating Input Speed
(Btuh)
High*
Med-High
054A3XE
(54,000)
Med-Low**
Low
High*
Med-High
072B4XE
(72,000)
Med-Low**
Low
High*
Med-High
090B4XE
(90,000)
Med-Low**
Low
High*
Med-High
108C5XE
(108,000)
Med-Low**
Low
High*
Med-High
126D5XE
(126,000)
Med-Low**
Low
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
GDD80A - DOWNFLOW FURNACES - 80+ AFUE
External Static Pressure (Inches Water Column)
0.1 0.2
CFM Rise CFM Rise CFM
1,375 29 1,340 30 1,300
1,155 35 1,130 35 1,110
790 51 775 52 765
650 62 640 63 630
1,675 32 1655 32 1640
1,330 40 1315 41 1300
1,180 45 1165 46 1150
940 57 925 58 900
1,610 41 1590 42 1575
1,295 51 1275 52 1260
1,155 58 1235 54 1115
910 73 885 75 860
2,395 33 2,335 34 2,285
2,190 37 2,135 37 2,115
1,785 45 1,770 45 1,740
1,145 70 1,110 72 1,070
2,445 38 2,395 39 2,385
2,195 43 2,170 43 2,140
1,795 52 1,780 52 1,770
1,480 63 1,475 63 1,450
0.3 0.4 0.5
Rise CFM Rise CFM Rise
31 1,270 31 1,225 33
36 1,085 37 1,055 38
52 750 53 730 55
63 610 66 590 68
33 1620 33 1590 34
41 1280 42 1255 42
46 1135 47 1115 48
59 880 61 850 63
42 1560 43 1540 43
53 1250 53 1220 55
60 1095 61 1065 63
78 835 80 810 82
35 2,230 36 2,200 36
38 2,080 38 2,030 39
46 1,725 46 1,685 47
75 1,035 77 1,000 80
39 2,330 40 2,275 41
44 2,120 44 2,090 45
53 1,760 53 1,725 54
64 1,440 65 1,440 65
0.6 0.7
CFM Rise CFM Rise CFM
1,175 34 1,115 36 1,035
1,015 39 975 41 910
700 57 665 60 610
565 71 530 75 480
1560 35 1520 35 1475
1230 44 1200 44 1150
1090 50 1060 50 1010
825 65 795 67 760
1495 46 1460 46 1415
1195 57 1170 57 1120
1040 66 1015 66 980
785 85 765 87 735
2,140 37 2,080 38 2,000
1,975 41 1,915 42 1,810
1,645 49 1,615 50 1,565
950 84 905 88 835
2,225 42 2,130 44 2,015
2,030 46 1,975 47 1,855
1,690 55 1,655 56 1,610
1,415 66 1,405 66 1,375
0.8
Rise
39
44
66
83
36
46
53
70
47
60
68
91
40
44
51
96
46
50
58
68
29