34
Airflow
1. CFM in chart is without filter(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. For most jobs, about 400 CFM per ton when cooling is desirable.
3. INSTALLATION and/or BLOWER SPEED CAN BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING
PLATE.
4. 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.
5. 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.
*MES96***
TABLE 9
0.6
0.7
0.8
Wire Color
Function
Tons AC
CFM
Rise
CFM
Rise
CFM
Rise
CFM
Rise
CFM
Rise
CFM
CFM
CFM
Red
High-Cool
3
1350
NA
1310
NA
1273
NA
1234
NA
1198
NA
1156
1117
1078
Blue
Med Hi - Heat
2.5
1247
29
1212
30
1167
31
1129
32
1087
33
1043
997
952
Brown
Med Low
2
1151
31
1107
32
1067
35
1021
35
977
36
928
880
835
Black
Low
1.5
922
39
870
41
819
43
763
NA
704
NA
643
592
539
Orange
Fan Only
1
779
NA
661
NA
588
NA
516
NA
455
NA
394
352
N/A
Red
High-Cool
3
1364
NA
1332
NA
1285
NA
1246
NA
1206
NA
1170
1127
1083
Blue
Med Hi - Heat
2.5
1259
42
1214
44
1175
45
1135
47
1091
49
1053
1008
957
Brown
Med Low
2
1165
46
1121
48
1073
50
1033
52
984
54
929
876
832
Black
Low
1.5
936
57
884
60
829
NA
770
NA
706
NA
645
593
539
Orange
Fan only
1
815
NA
665
NA
596
NA
517
NA
451
NA
396
345
Na
Red
High-Cool
5
2298
NA
2260
NA
2222
NA
2182
NA
2149
NA
2114
2087
2022
Blue
Med Hi - Heat
4
1701
42
1641
43
1600
45
1548
46
1502
47
1454
1411
1366
Brown
Med Low
3.5
1575
45
1528
47
1478
48
1426
50
1373
52
1323
1272
1220
Black
Low
2.5
1302
55
1220
60
1187
NA
1126
NA
1063
NA
1004
936
871
Orange
Fan only
1.5
1056
NA
981
NA
915
NA
842
NA
764
NA
683
604
540
*MES960403BU
*MES960603BU
*MES960805CU
EXTERNAL STATIC PRESSURE (inches water column)
0.1
0.2
0.3
0.4
0.5