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18
Table 5 – Air Delivery -- CFM (With Filter)*
Unit Size
Operating Mode
CFM
Airflow
Setting
External
Static
Pressure
Range*
(In. W.C.)
External Static Pressure (ESP) (IN. W.C.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
070---12
AIRFLOW (CFM)
††
Low Heat
735 (615)†
0---0.50
735
735
735
735
725
High Heat
1180 (1060)†
0---1.0
1160
1165
1175
1180
1180
1180
1180
1180
1180
1175
††
1---1/2---Ton Cooling
525
0---0.50‡
515
500
500
490
485
††
2---Ton A/C Cooling
700
0---0.50‡
690
680
675
680
675
2---1/2---Ton A/C Cooling
875
0---1.0‡
875
875
875
870
865
855
850
835
825
820
3---Ton A/C Cooling
1050
0---1.0‡
1050
1050
1050
1050
1050
1050
1045
1035
1020
1000
3---1/2---Ton A/C Cooling
1225
0---1.0
1220
1225
1225
1225
1225
1220
1205
1190
1185
1170
Maximum
1400
0---1.0
1395
1400
1400
1400
1395
1385
1370
1340
1300
1245
090---16
Low Heat
985 (825)†
0---1.0
950
970
985
985
985
985
985
985
985
980
High Heat
1210 (1090)†
0---1.0
1190
1205
1210
1210
1210
1210
1210
1210
1210
1200
††
1---1/2---Ton A/C Cooling
525
0---0.50‡
525
520
525
495
475
††
2---Ton A/C Cooling
700
0---0.50‡
680
680
680
675
670
2---1/2---Ton A/C Cooling
875
0---1.0‡
815
845
845
855
850
850
845
835
820
805
3---Ton A/C Cooling
1050
0---1.0‡
1005
1005
1015
1035
1040
1040
1035
1030
1025
1010
3---1/2---Ton A/C Cooling
1225
0---1.0
1190
1200
1200
1205
1205
1215
1205
1200
1185
1170
4---Ton A/C Cooling
1400
0---1.0
1350
1370
1390
1390
1400
1390
1380
1380
1360
1340
Maximum
1600
0---1.0
1595
1600
1600
1600
1595
1555
1505
1465
1430
1390
110---20***
Low Heat
1320 (1110)†
0---1.0
1275
1295
1315
1320
1320
1320
1320
1320
1320
1315
High Heat
1475 (1330)†
0---1.0
1460
1465
1475
1475
1475
1475
1475
1475
1465
1465
††
2---Ton A/C Cooling
700
0---0.50‡
700
700
700
700
700
††
2---1/2---Ton A/C Cooling
875
0---0.50‡
875
875
875
875
875
††
3---Ton A/C Cooling
1050
0---0.50‡
1050
1050
1050
1050
1050
3---1/2---Ton A/C Cooling
1225
0---1.0‡
1225
1225
1225
1225
1225
1225
1225
1225
1225
1225
4---Ton A/C Cooling
1400
0---1.0‡
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
5---Ton A/C Cooling
1750
0---1.0‡
1750
1750
1750
1750
1750
1750
1750
1750
1740
1725
6---Ton A/C Cooling
2100
0---1.0
2100
2100
2100
2100
2090
2075
2055
2040
2005
1970
Maximum
2200
0---1.0
2200
2190
2190
2180
2155
2145
2125
2100
2080
2020
135---22
Low Heat
1700 (1430)†
0---1.0
1700
1700
1700
1700
1700
1695
1700
1695
1685
1670
High Heat
1915 (1725)†
0---1.0
1900
1905
1915
1915
1915
1915
1915
1915
1915
1915
††
2---Ton A/C Cooling
700
0---0.50‡
700
700
700
700
665
††
2---1/2---Ton A/C Cooling
875
0---0.50‡
870
870
865
865
865
††
3---Ton A/C Cooling
1050
0---0.50‡
1010
1030
1050
1050
1050
3---1/2---Ton A/C Cooling
1225
0---1.0‡
1155
1180
1200
1210
1220
1225
1225
1225
1225
1225
4---Ton A/C Cooling
1400
0---1.0‡
1395
1400
1400
1400
1400
1400
1400
1390
1375
1355
5---Ton A/C Cooling
1750
0---1.0‡
1740
1750
1750
1750
1735
1740
1735
1730
1715
1700
6---Ton A/C Cooling
2100
0---1.0
2075
2085
2090
2100
2100
2100
2090
2080
2055
2025
Maximum
2200
0---1.0
2180
2195
2200
2200
2200
2200
2185
2165
2140
2095
155---22
Low Heat
1715 (1440)†
0---1.0
1715
1715
1715
1715
1715
1705
1710
1705
1705
1695
High Heat
1970 (1775)†
0---1.0
1955
1965
1965
1970
1970
1970
1970
1970
1970
1960
††
2---Ton A/C Cooling
700
0---0.50‡
700
700
700
700
680
††
2---1/2---Ton A/C Cooling
875
0---0.50‡
865
875
875
865
865
††
3---Ton A/C Cooling
1050
0---0.50‡
1015
1020
1035
1045
1050
3---1/2---Ton A/C Cooling
1225
0---1.0‡
1160
1185
1215
1225
1225
1225
1225
1225
1225
1225
4---Ton A/C Cooling
1400
0---1.0‡
1385
1400
1400
1400
1400
1400
1395
1395
1380
1360
5---Ton A/C Cooling
1750
0---1.0‡
1745
1750
1750
1750
1745
1740
1745
1745
1740
1735
6---Ton A/C Cooling
2100
0---1.0
2055
2070
2080
2085
2095
2100
2100
2100
2090
2065
Maximum
2200
0---1.0
2175
2190
2200
2200
2200
2200
2200
2200
2180
2160
*
Actual external static pressure (ESP) can be determined by using the fan laws (CFM 2 proportional to ESP); such as, a system with 1180 CFM
at 0.5 ESP would operate at cooling airflow of 1050 CFM at 0.4 ESP and low---heating airflow of 735 CFM at 0.19 ESP.
{
Comfort airflow values are shown in parenthesis. Comfort airflow is selected when the low---heat rise adjustment switch (SW1---3) is OFF and
the comfort/efficiency switch (SW1---4) is ON.
}
Ductwork must be sized for high---heating CFM within the operational range of ESP.
{{
Operation within the blank areas of the chart is not recommended because high---heat operation will be above 1.0 ESP.
***
All airflow on 110 size furnace are 5% less on side return only installations.
58C
V