Airflow Data
(CFM & Temperature Rise vs. External Static Pressure)
Model
Motor
Speed
Tons
AC¹
External Static Pressure, (Inches Water Column)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
CFM
Rise
CFM
Rise
CFM
Rise
CFM
Rise
CFM
Rise
CFM
CFM
CFM
DM80HS
0403A*A
High
3
1,521
---
1,466
---
1,414
---
1,373
---
1,298
---
1,243
1,164
1,075
Med
2.5
1,160
26
1,160
26
1,132
26
1,121
26
1,082
27
1,042
997
925
Med-Lo
2
961
31
955
31
948
31
932
32
913
33
882
821
803
Low
1.5
781
38
785
38
781
38
773
38
761
32
745
716
668
DM80HS
0603A*A
High
3
1,422
31
1,352
33
1,307
34
1,197
37
1,157
38
1,092
1,075
983
Med
2.5
1,098
40
1,081
41
1,051
42
1,039
43
1,021
44
983
924
868
Med-Lo
2
919
48
913
49
892
50
847
----
829
----
818
792
728
Low
1.5
758
----
741
----
741
----
733
----
699
----
677
649
626
DM80HS
0604B*A
High
4
2,134
21
2,100
21
2,042
22
1,975
23
1,883
24
1,786
1,700
1,601
Med
3.5
1,668
27
1,663
27
1,656
27
1,645
27
1,616
28
1,549
1,492
1,391
Med-Lo
3
1,419
31
1,426
31
1,426
31
1,432
31
1,419
31
1,378
1,328
1,261
Low
2.5
1,134
39
1,145
39
1,166
38
1,171
38
1,160
38
1,144
1,111
1,071
DM80HS
0803B*A
High
3
1,607
37
1,572
38
1,547
39
1,498
40
1,448
41
1,390
1,302
1,222
Med
2.5
1,159
51
1,156
51
1,145
52
1,127
53
1,108
53
1,075
1,033
957
Med-Lo
2
938
63
916
65
916
65
900
----
889
----
865
829
785
Low
1.5
785
----
766
----
743
----
730
----
709
----
683
666
604
DM80HS
0804B*A
High
4
2,051
----
1,983
----
1,895
---
1,812
---
1,725
---
1,627
1,530
1,439
Med
3.5
1,736
---
1,708
35
1,652
36
1,611
37
1,540
38
1,475
1,394
1,307
Med-Lo
3
1,493
35
1,668
36
1,459
41
1,429
41
1,389
43
1,339
1,274
1,204
Low
2.5
1,200
49
1,185
50
1,180
50
1,173
51
1,158
51
1,125
1,125
1,080
DM80HS
0805C*A
High
5
2,290
----
2,229
----
2,155
----
2,047
----
1,960
----
1,837
1,712
1,584
Med
4
1,852
---
1,820
---
1,777
---
1,719
---
1,641
36
1,567
1,469
1,382
Med-Lo
3.5
1,615
37
1,592
37
1,556
38
1,516
39
1,470
40
1,405
1,346
1,235
Low
3
1,290
46
1,285
46
1,265
47
1,235
48
1,214
49
1,174
1,044
904
DM80HS
1005C*A
High
5
2,323
---
2,225
---
2,120
35
2,040
36
1,974
38
1,801
1,688
1,577
Med
4
1,858
40
1,847
40
1,799
41
1,744
42
1,674
44
1,577
1,493
1,399
Med-Lo
3.5
1,596
46
1,587
47
1,571
47
1,552
48
1,493
50
1,397
1,326
1,217
Low
3
1,291
57
1,272
58
1,261
59
1,257
59
1,205
61
1,168
1,118
1,060
DM80HS
1205D*A
High
5
2,469
---
2,389
---
2,300
---
2,223
40
2,131
42
2,027
1,902
1,786
Med
4
1,575
56
1,558
57
1,545
58
1,513
59
1,500
59
1,419
1,354
1,271
Med-Lo
3.5
1,402
63
1,380
64
1,343
66
1,319
67
1,296
69
1,245
1,183
1,106
Low
3
1,200
----
1,186
----
1,161
----
1,127
----
1,082
----
1,042
995
926
DM80HS
1405D*A
High
5
2,469
---
2,389
---
2,300
---
2,223
40
2,131
42
2,027
1,902
1,786
Med
4
1,575
56
1,558
57
1,545
58
1,513
59
1,500
59
1,419
1,354
1,271
Med-Lo
3.5
1,402
63
1,380
64
1,343
66
1,319
67
1,296
69
1,245
1,183
1,106
Low
3
1,200
----
1,186
----
1,161
----
1,127
----
1,082
----
1,042
995
926
Notes
•
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.
•
All furnaces ship as high-speed cooling and medium-speed heating. Installer must adjust blower cooling and heating speed as needed.
•
For most jobs, 400 CFM per ton for cooling is desirable.
•
INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
•
This chart is for information only. For satisfactory operation, external static pressure should not exceed value shown on the rating plate.
•
The dashed (----) areas indicate a temperature rise not recommended for this model.
•
At higher altitudes, a properly derated unit will have approximately the same temperature rise at a particular CFM, while ESP at the CFM will be lower.
4
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SS-DM80HS
SS-DM80HS
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