11
BLOWER PERFORMANCE SPECIFICATIONS GMS8
NOTES:
• CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer.
• All furnaces ship as hig-speed cooling. Installer must adjust blower cooling speed as needed.
• For most jobs, about 400 CFM per ton when cooling is desirable
• INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
• The chart is for information only. For satisfactory operation, external static pressure must not exceed values shown on the rating plate. The shaded area insicated
ranges in excess of maximum static pressure allowed when heating.
• The dashed (---) areas indicate a temperature rise not recommended for this model.
• The above chart is for U.S. furnaces installed at 0' - 2,000'. At higher altitudes, a properly de-rated unit will have approximatley the same temperature rise at a
particular CFM, while ESP at the 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 1521 22 1466 23 1414 24 1373 24 1298 26 1243 1164 1075
*M(H/S)80453A*** MED 2.5 1160 29 1160 29 1132 29 1121 30 1082 31 1042 997 925
(MEDIUM) MED-LO 2.0 961 35 955 35 948 35 932 36 913 37 882 821 803
LOW 1.5 781 43 785 42 781 43 773 43 761 44 745 716 668
HIGH 3.0 1422 36 1352 38 1307 40 1197 43 1157 45 1092 1075 983
*M(H/S)80703A*** MED 2.5 1098 47 1081 48 1051 49 1039 50 1021 51 983 924 868
(MEDIUM) MED-LO 2.0 919 56 913 57 892 58 847 ---- 829 ---- 818 792 728
LOW 1.5 758 ---- 741 ---- 741 ---- 733 ---- 699 ---- 677 649 626
HIGH 4.0 2134 ---- 2100 25 2042 25 1975 26 1883 28 1786 1700 1601
*M(H/S)80704B*** MED 3.5 1668 31 1663 31 1656 31 1645 32 1616 32 1549 1492 1391
(MEDIUM) MED-LO 3.0 1419 37 1426 36 1426 36 1432 36 1419 37 1378 1328 1261
LOW 2.5 1134 46 1145 45 1166 44 1171 44 1160 45 1144 1111 1071
HIGH 3.0 1607 41 1572 42 1547 43 1498 45 1448 46 1390 1302 1222
*M(H/S)80903B*** MED 2.5 1159 58 1156 58 1145 58 1127 59 1108 60 1075 1033 957
(MEDIUM) MED-LO 2.0 938 ---- 916 ---- 916 ---- 900 ---- 889 ---- 865 829 785
LOW 1.5 785 ---- 766 ---- 743 ---- 730 ---- 709 ---- 683 666 604
HIGH 4.0 2051 ---- 1983 ---- 1895 35 1812 37 1725 39 1627 1530 1439
*M(H/S)80904B*** MED 3.5 1736 38 1708 39 1652 40 1611 41 1540 43 1475 1394 1307
(MEDIUM) MED-LO 3.0 1493 45 1668 40 1459 46 1429 47 1389 48 1339 1274 1204
LOW 2.5 1200 56 1185 56 1180 56 1173 57 1158 58 1125 1125 1080
HIGH 5.0 2290 ---- 2229 ---- 2155 ---- 2047 ---- 1960 ---- 1837 1712 1584
*M(H/S)80905C*** MED 4.0 1852 36 1820 37 1777 38 1719 39 1641 41 1567 1469 1382
(MEDIUM) MED-LO 3.5 1615 41 1592 42 1556 43 1516 44 1470 45 1405 1346 1235
LOW 3.0 1290 52 1285 52 1265 53 1235 54 1214 55 1174 1044 904
HIGH 5.0 2323 37 2225 38 2120 40 2040 42 1974 43 1801 1688 1577
*M(H/S)81155C*** MED 4.0 1858 46 1847 46 1799 47 1744 49 1674 51 1577 1493 1399
(MEDIUM) MED-LO 3.5 1596 53 1587 54 1571 54 1552 55 1493 57 1397 1326 1217
LOW 3.0 1291 ---- 1272 ---- 1261 ---- 1257 ---- 1205 ---- 1168 1118 1060
HIGH 5.0 2469 42 2389 43 2300 45 2223 47 2131 49 2027 1902 1786
*M(H/S)81405D*** MED 4.0 1575 66 1558 67 1545 67 1513 69 1500 69 1419 1354 1271
(MEDIUM) MED-LO 3.5 1402 ---- 1380 ---- 1343 ---- 1319 ---- 1296 ---- 1245 1183 1106
LOW 3.0 1200 ---- 1186 ---- 1161 ---- 1127 ---- 1082 ---- 1042 995 926
(CFM & Temperature Rise vs. External Static Pressure)
0.1 0.2 0.3 0.4 0.5
Model
Heating Speed
As Shipped
Motor
Speed
EXTERNAL STATIC PRESSURE (Inches Water Column)
()