Filter
Top Products
BLOWER PERFORMANCE SPECIFICATIONS
13
1. CFM in chart is without filters(s). Filters do not ship with this furnace, but must be provided by the installer.
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 29 1318 30 1260 31 1202 33 1128 35 1044 955 853
GCH90453BXA* MED 2.5
1214 32 1172 34 1123 35 1064 37 1012 39 938 859 741
(MED-HI) MED-LO 2.0
997 40 994 40 960 41 923 43 884 45 817 741 611
LOW 1.5
757 52 753 52 734 54 704 56 674 59 620 524 438
HIGH 3.0
1449 41 1409 42 1326 45 1273 47 1201 49 1194 1136 1018
GCH90703BXA* MED 2.5
1192 50 1172 51 1141 52 1094 54 1046 57 973 904 793
(MED-HI) MED-LO 2.0
981 61 962 62 943 63 917 65 888 67 830 764 665
LOW 1.5
750 79 730 81 714 83 692 86 657 90 620 570 502
HIGH 4.0
2069 29 1965 30 1871 32 1756 34 1661 36 1549 1415 1275
GCH90704CXA* MED 3.5
1752 34 1724 34 1667 36 1603 37 1488 40 1402 1290 1082
(MED-HI) MED-LO 3.0
1437 41 1437 41 1417 42 1369 43 1320 45 1256 1140 984
LOW 2.5
1184 50 1177 50 1161 51 1132 52 1095 54 1047 928 837
HIGH 4.0
1970 40 1874 42 1757 45 1667 48 1566 51 1431 1334 1182
GCH90904CXA* MED 3.5
1713 46 1650 48 1572 50 1510 52 1418 56 1313 1211 1079
(MED-HI) MED-LO 3.0
1439 55 1412 56 1370 58 1327 60 1260 63 1166 1078 956
LOW 2.5
1183 67 1155 69 1122 71 1108 72 1062 75 1011 931 816
HIGH 5.0
2147 37 2114 37 2057 39 2030 39 1978 40 1889 1784 1713
GCH90905DXA* MED 4.0
1675 47 1686 47 1640 48 1623 49 1557 51 1501 1455 1360
(MED-HI) MED-LO 3.5
1489 53 1470 54 1436 55 1409 56 1361 58 1318 1243 1130
LOW 3.0
1307 61 1265 63 1234 64 1203 66 1168 68 1096 1053 991
HIGH 5.0
2134 46 2103 47 2029 48 1941 51 1906 51 1818 1733 1625
GCH91155DXA* MED 4.0
1678 58 1643 60 1643 60 1577 62 1527 64 1489 1423 1339
(MED-HI) MED-LO 3.5
1453 68 1440 68 1426 69 1363 72 1349 73 1314 1253 1205
LOW 3.0
1259 78 1239 79 1220 80 1181 83 1159 85 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)
()