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Table 1. Furnace Airfl ow Data
CAPACITIES —Furnace Airfl ow Data
NOTES: 1. Airfl ow rates of 1800 CFM or more require two return air connections. Data is for operation with fi lter(s).
2. Temperature rises in the table are approximate. Actual temperature rises may vary.
3. Temperature rises and airfl ows for external static pressures greater than 0.5 are for reference only.
These conditions are not recommended.
( ) Can be C or N
** Factory Set Cooling Speed
** Factory Set Heating Speed
- Not Recommended
G6RC UPFLOW FURNACE
Model Heating
External Static Pressure (Inches Water Column)
Number Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
*RC- (Btuh) Speed HP
CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
High* 950 36 920 38 890 39 850 41 800 43 750 46 690 50 630 55
040( )-08A 40,000 Medium** 1/5 740 47 710 49 680 51 650 53 600 58 550 63 490 - 430 -
Low 620 56 590 59 560 62 520 - 470 - 410 - 350 - 290 -
High* 1330 - 1280 - 1230 - 1170 - 1120 - 1030 - 940 37 850 41
040( )-12A 40,000 Medium** 1/3 1190 - 1160 - 1110 - 1060 - 1010 - 910 38 820 42 720 48
Low 830 42 810 43 780 44 760 46 720 48 670 52 610 57 550 63
High* 1310 - 1260 - 1210 - 1160 45 1100 47 1040 50 980 53 920 56
060( )-12A 60,000 Medium** 1/3 1160 45 1120 46 1080 48 1050 49 990 52 940 55 890 58 830 63
Low 800 65 780 67 760 68 740 70 710 73 680 - 650 - 620 -
High* 1775 38 1724 39 1652 40 1583 42 1505 44 1430 46 1343 49 1226 54
080( )-12B 80,000 Med-High** 1/2 1417 47 1385 48 1339 50 1280 52 1224 54 1163 57 1097 61 1013 66
Med-Low 1031 65 987 67 967 69 914 73 882 75 839 - 783 - 692 -
Low 808 - 751 - 717 - 679 - 641 - 595 - 538 - 430 -
High* 1840 - 1780 - 1700 41 1630 42 1550 45 1470 47 1380 50 1290 54
080( )-16B 80,000 Med-High** 1/2 1600 43 1560 44 1470 47 1400 49 1350 51 1280 54 1210 57 1150 60
Med-Low 1380 50 1350 51 1300 53 1250 55 1190 58 1120 62 1040 67 960 -
Low 1100 63 1050 66 1000 69 950 - 900 - 850 - 800 - 750 -
High* 2215 30 2155 31 2090 32 2030 33 1975 34 1885 35 1810 37 1730 39
080( )-20B 80,000 Med-High 3/4 2000 33 1970 34 1930 35 1870 36 1820 37 1755 38 1695 39 1625 41
Med-Low 1670 39 1665 40 1660 41 1630 41 1590 42 1535 43 1470 45 1410 47
Low** 1365 48 1360 49 1350 49 1340 50 1305 51 1300 51 1255 53 1225 54
High* 1910 45 1860 47 1780 49 1700 51 1620 53 1520 57 1420 61 1310 66
100( )-16B 100,000 Med-High** 1/2 1640 53 1620 53 1540 56 1480 58 1420 61 1340 65 1250 69 1150 75
Med-Low 1440 60 1410 61 1370 63 1320 66 1270 68 1210 72 1140 - 1060 -
Low 1230 70 1210 72 1180 73 1140 - 1090 - 1030 - 960 - 880 -
High* 2195 39 2140 40 2065 41 2000 42 1960 44 1860 46 1780 48 1695 50
100( )-20B 100,000 Med-High** 3/4 1975 43 1910 44 1875 45 1845 46 1805 47 1735 50 1670 51 1590 53
Med-Low 1650 51 1615 52 1605 53 1570 54 1540 55 1485 57 1435 59 1370 62
Low 1320 64 1300 65 1280 66 1275 67 1265 67 1250 68 1210 70 1160 73
High* 1860 56 1800 58 1730 60 1650 63 1570 66 1480 70 1380 75 1270 82
120( )-16C 120,000 Med-High** 1/2 1650 63 1610 65 1550 67 1480 70 1410 74 1320 79 1230 84 1120 -
Med-Low 1440 72 1410 74 1380 75 1320 79 1280 81 1220 85 1150 - 1080 -
Low 1230 84 1210 - 1180 - 1140 - 1090 - 1030 - 960 - 880 -
High* 2260 - 2200 - 2140 - 2070 - 1990 - 1910 - 1810 57 1710 61
120( )-20C 120,000 Med-High** 3/4 1870 56 1840 56 1790 58 1760 59 1710 61 1660 63 1610 65 1560 67
Med-Low 1540 67 1530 68 1510 69 1470 71 1430 73 1370 76 1300 80 1220 85
Low 1360 76 1330 78 1310 79 1280 81 1250 83 1220 85 1190 - 1150 -