Specification

NOTE: 1. Temperature rises shown are approximate; actual temperature rises may vary.
2. Temperture rises in shaded areas are for reference only; these conditions are not recommended.
* Factory set cooling speed
†
Factory set heating speed
GDD92-
Model
Htg
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
-054B4 54K
High* 1580 29 1550 30 1520 30 1485 31 1460 32 1425 32 1375 33 1320 35
Med Hi 1240 37 1230 37 1210 38 1185 39 1165 39 1135 41 1100 42 1045 44
M-Low
†
1145 40 1120 41 1100 42 1080 43 1055 44 1030 45 985 47 940 49
Low 895 51 870 53 850 54 825 56 800 58 770 60 740 62 715 64
-072B4 72K
High* 1560 39 1530 40 1500 41 1480 41 1435 43 1400 44 1360 45 1310 47
Med Hi
†
1245 49 1225 50 1205 51 1180 52 1150 53 1125 55 1090 56 1045 59
M-Low 1085 57 1070 57 1045 59 1025 60 1000 61 970 63 930 66 880 70
Low 850 72 830 74 800 77 780 79 760 81 730 84 710 86 685 90
-090C5 90K
High* 1955 39 1905 40 1835 42 1795 43 1730 44 1620 47 1545 50 1450 53
Med Hi
†
1845 42 1790 43 1750 44 1680 46 1515 51 1540 50 1475 52 1410 54
M-Low 1320 58 1290 59 1250 61 1215 63 1180 65 1120 68 1050 73 970 79
Low 1190 64 1165 66 1125 68 1080 71 1055 73 1000 77 945 81 875 88
-120D5 120K
High* 2215 46 2150 48 2075 49 2035 50 1970 52 1905 54 1800 57 1745 59
Med Hi
†
2050 50 2015 51 1955 52 1900 54 1860 55 1795 57 1720 59 1620 63
M-Low 1720 59 1690 60 1655 62 1640 62 1610 63 1560 66 1505 68 1465 70
Low 1420 72 1410 72 1400 73 1365 75 1350 76 1335 77 1290 79 1260 81
Downow Specications
* Factory setting
Gas connection for all models is 1/2" N.P.T.
1
Ratings to 2,000 ft. Over 2,000 ft, reduce 4% for each 1,000 ft. above sea level.
Blower Performance - Downow
GDD92A Models -054B4 -072B4 -090C5 -120D5
Input-BTUH
1
54,000 72,000 90,000 120,000
Heating Cap. BTUH 49,700 66,000 82,800 110,400
AFUE 92.1 92.1 92.1 92.1
Blower D x W 11 x 8 11 x 8 10 x 10 11 x 10
Motor HP-Speed-Type 1/2-4-PSC 1/2-4-PSC 1.0-4-PSC 1.0-4-PSC
Heating Speed* Med-Low Med-High Med-High Med-High
Cooling Speed* High High High High
Motor FLA 8.20 8.20 7.50 13.75
Rated Ext. SP in W.C. 0.5 0.5 0.5 0.5
Temp. Rise Range
o
F 30-60 35-65 35-65 40-70
Shipping Weight (lbs) 120 125 135 155
5
WARNING
THIS FURNACE IS NOT APPROVED OR RECOMMENDED
FOR USE IN MOBILE HOMES