AIRFLOW DATA
9
*CSS92
0.6
0.7
0.8
CFM
Rise
CFM
Rise
CFM
Rise
CFM
Rise
CFM
Rise
CFM
CFM
CFM
High
3
1,400
N/A
1,331
N/A
1,263
N/A
1,189
N/A
1,106
31
1,020
941
843
Med
2.5
1,204
N/A
1,176
N/A
1,121
30
1,072
32
1,002
34
927
853
740
Med-Lo
2
1020
33
998
34
968
35
923
37
880
39
820
739
652
Low
1.5
841
41
827
41
797
43
766
44
727
47
680
634
556
High
3
1,668
31
1,335
38
1,288
40
1,207
42
1,133
45
1,061
955
845
Med
2.5
1,224
42
1,182
43
1,139
45
1,088
47
1,015
50
948
859
759
Med-Lo
2
1030
50
1005
51
988
52
942
54
893
57
830
751
666
Low
1.5
859
60
830
62
815
63
789
65
751
N/A
693
629
556
High
4
1,770
39
1,645
41
1,610
42
1,528
45
1,437
47
1,340 1,251 1,141
Med
3.5
1,690
40
1,615
42
1,531
45
1,470
46
1,393
49
1,308 1,196 1,099
Med-Lo
3.0
1,612
42
1,540
44
1,472
46
1,398
49
1,306
52
1,223 1,132 1,010
Low
2.5
1,396
49
1,339
51
1,304
52
1,250
55
1,170
58
1,092 1,010
906
High
4
1,793
48
1,699
50
1,610
53
1,533
56
1,461
58
1,363 1,247 1,146
Med
3.5
1,693
50
1,622
53
1,552
55
1,467
58
1,390
61
1,320 1,205 1,083
Med-Lo
3.0
1,632
52
1,546
55
1,493
57
1,415
60
1,332
64
1,257 1,148 1,054
Low
2.5
1,429
60
1,380
62
1,334
64
1,258
N/A
1,199
N/A
1,136 1,041
942
¹ at 0.5" ESP
Notes
• All furnaces ship as high-speed cooling and medium-speed heating. Installer must adjust blow er cooling & heating speed as needed.
• For most jobs, about 400 CFM per ton w hen cooling is desirable.
*CSS92
1005CNA
• CFM in chart is w ithout filter(s). Filters do not ship w ith this furnace, but must be provided by the installer. If the
furnace requires tw o return filters,
• 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 show n on the
ti
l t
• The above chart is for U.S. furnaces installed at 0-2000 feet. At higher altitudes, a properly derated unit w ill have
approximately the same temperature rise at a particular CFM, w hile ESP at the CFM w ill be low er.
*CSS92
0402BNA
*CSS92
0603BNA
*CSS92
0804CNA
(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
