BLOWER PERFORMANCE SPECIFICATIONS
12
1.
CFM in chart is without filters(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two
return filters, this chart assumes both filters are installed.
2.
All furnaces ship as high speed cooling. Installer must adjust blower cooling speed as needed.
3.
For most jobs, about 400 CFM per ton when cooling is desirable.
4.
INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
5.
The chart is for information only. For satisfactory operation, external static pressure must not exceed value shown on rating plate. The
shaded area indicates ranges in excess of maximum external static pressure allowed when heating. The data for 0.6" w.c. to 0.8" w.c.
is shown for air conditioning purposes only.
6
The dashed (---) areas indicate a temperature rise not recommended for this model.
7.
The above chart is for U.S. furnaces installed at 0-4000 feet. At higher altitudes, a properly derated unit will have approximately the
same temperature rise at a particular CFM, while the ESP at that CFM will be lower.
Tons AC
at 0.5"
0.6
0.7
0.8
ESP
CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM
HIGH
3.0
1352
---
1318
---
1260
---
1202
---
1128
---
1044
955
853
GKS90453BX*
MED 2.5
1214
---
1172
---
1123
---
1064
---
1012
---
938
859
741
(LOW)
MED-LO
2.0
997
---
994
---
960
35
923
36
884
38
817
741
611
LOW
1.5
757
44
753
44
734
45
704
47
674
49
620
524
438
HIGH
3.0
1449
36
1409
37
1326
39
1273
41
1201
43
1194 1136 1018
GKS90703BX*
MED
2.5
1192
43
1172
44
1141
45
1094
47
1046
49
973
904
793
(MED-HI)
MED-LO
2.0
981
53
962
54
943
55
917
56
888
58
830
764
665
LOW
1.5
750
---
730
---
714
---
692
---
657
---
620
570
502
HIGH
4.0
2069
---
1965
---
1871
---
1756
---
1661
---
1549 1415 1275
GKS90704CX*
MED 3.5
1752
---
1724
---
1667
---
1603
---
1488
35
1402 1290 1082
(LOW)
MED-LO
3.0
1437
36
1437
36
1417
36
1369
38
1320
39
1256 1140
984
LOW
2.5
1184
44
1177
44
1161
44
1132
46
1095
47
1047
928
837
HIGH
4.0
1970
---
1874
35
1757
38
1667
40
1566
42
1431 1334 1182
GKS90904CX*
MED 3.5
1713
39
1650
40
1572
42
1510
44
1418
47
1313 1211 1079
(MED-LO)
MED-LO
3.0
1439
46
1412
47
1370
48
1327
50
1260
53
1166 1078
956
LOW
2.5
1183
56
1155
57
1122
59
1108
60
1062
62
1011
931
816
HIGH
5.0
2147
---
2114
---
2057
---
2030
---
1978
---
1889 1784 1713
GKS90905DX*
MED 4.0
1675
40
1686
---
1640
40
1623
41
1557
43
1501 1455 1360
(MED-LO)
MED-LO
3.5
1489
45
1470
45
1436
46
1409
47
1361
49
1318 1243 1130
LOW
3.0
1307
51
1265
52
1234
54
1203
55
1168
57
1096 1053
991
HIGH
5.0
2134
40
2103
40
2029
42
1941
44
1906
44
1818 1733 1625
GKS91155DX*
MED 4.0
1678
51
1643
52
1643
52
1577
54
1527
56
1489 1423 1339
(MED-HI)
MED-LO
3.5
1453
58
1440
59
1426
59
1363
62
1349
63
1314 1253 1205
LOW
3.0
1259
67
1239
68
1220
70
1181
---
1159
---
1118 1082 1015
BLOWER PERFORMANCE
0.1
0.2
0.3
0.4
0.5
(CFM & Temperature Rise vs. External Static Pressure)
Model
Heating Speed
As Shipped
Motor
Speed
EXTERNAL STATIC PRESSURE (Inches Water Column)
(
)
