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Whirlpool WFM18 Installation Instructions Manual page 29

80% single-stage multispeed gas furnace

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Blower Performance Data
CFM and Temperature Rise vs. External Static Pressure
Model—Heating
Motor
Speed as Shipped
Speed
WFM180453A***
High
(Medium
Med
Med-Lo
Low
WFM180703A***
High
(Medium)
Med
Med-Lo
Low
WFM180704B***
High
(Medium)
Med
Med-Lo
Low
WFM180903B***
High
(Medium)
Med
Med-Lo
Low
WFM180904B***
High
(Medium)
Med
Med-Lo
Low
WFM180905C***
High
(Medium)
Med
Med-Lo
Low
WFM181155C***
High
(Medium)
Med
Med-Lo
Low
WFM181405D***
High
(Medium)
Med
Med-Lo
Low
External Static Pressure (Inches Water Column)
Tons
AC at
0.1
0.2
0.5"
ESP
CFM
Rise CFM
3.0
1,521
22
1,466
2.5
1,160
29
1,160
2.0
961
35
955
1.5
781
43
785
3.0
1,422
36
1,352
2.5
1,098
47
1,081
2.0
919
56
913
1.5
758
-
741
4.0
2,134
-
2,100
3.5
1,668
31
1,663
3.0
1,419
37
1,426
2.5
1,134
46
1,145
3.0
1,607
41
1,572
2.5
1,159
58
1,156
2.0
938
-
916
1.5
785
-
766
4.0
2,051
-
1,983
3.5
1,736
38
1,708
3.0
1,493
45
1,668
2.5
1,200
56
1,185
5.0
2,290
-
2,229
4.0
1,852
36
1,820
3.5
1,615
41
1,592
3.0
1,290
52
1,285
5.0
2,323
37
2.225
4.0
1,858
46
1,847
3.5
1,596
53
1,587
3.0
1,291
-
1,272
5.0
2,469
42
2,389
4.0
1,575
66
1,558
3.5
1,402
-
1,380
3.0
1,200
-
1,186
0.3
0.4
Rise CFM
Rise CFM
23
1,414
24
1,373
29
1,132
29
1,121
35
948
35
932
42
781
43
773
38
1,307
40
1,197
48
1,051
49
1,039
57
892
58
847
-
741
-
733
25
2,042
25
1,975
31
1,656
31
1,645
36
1,426
36
1,432
45
1,166
44
1,171
42
1,547
43
1,498
58
1,145
58
1,127
-
916
-
900
-
743
-
730
-
1,895
35
1,812
39
1,652
40
1,611
40
1,459
46
1,429
56
1,180
56
1,173
-
2,155
-
2,047
37
1,777
38
1,719
42
1,556
43
1,516
52
1,265
53
1,235
38
2,120
40
2,040
46
1,799
47
1,744
54
1,571
54
1,552
-
1,261
-
1,257
43
2,300
45
2,223
67
1,545
67
1,513
-
1,343
-
1,319
-
1,161
-
1,127
0.5
0.6
0.7
Rise CFM
Rise CFM CFM CFM
24
1,298
26
1,243 1,164 1,075
30
1,082
31
1,042 997
36
913
37
882
821
43
761
44
745
716
43
1,157
45
1,092 1,075 983
50
1,021
51
983
924
-
829
-
818
792
-
699
-
677
649
26
1,883
28
1,786 1,700 1,601
32
1,616
32
1,549 1,492 1,391
36
1,419
37
1,378 1,328 1,261
44
1,160
45
1,144 1,111 1,071
45
1,448
46
1,390 1,302 1,222
59
1,108
60
1,075 1,033 957
-
889
-
865
829
-
709
-
683
666
37
1,725
39
1,627 1,530 1,439
41
1,540
43
1,475 1,394 1,307
47
1,389
48
1,339 1,274 1,204
57
1,158
58
1,125 1,125 1,080
-
1,960
-
1,837 1,712 1,584
39
1,641
41
1,567 1,469 1,382
44
1,470
45
1,405 1,346 1,235
54
1,214
55
1,174 1,044 904
42
1,974
43
1,801 1,688 1,577
49
1,674
51
1,577 1,493 1,399
55
1,493
57
1,397 1,326 1,217
-
1,205
-
1,168 1,118 1,060
47
2,131
49
2,027 1,902 1,786
69
1,500
69
1,419 1,354 1,271
-
1,296
-
1,245 1,183 1,106
-
1,082
-
1,042 995
0.8
925
803
668
868
728
626
785
604
926
29

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