Goodman Mfg GAS-FIRED WARM AIR FURNACE GKS9 - Manual (Page 38)

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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)
( )