30
WFD18
CFM and Temperature Rise vs. External Static Pressure
Model—Heating
Speed as Shipped
Motor
Speed
Tons
AC at
0.5"
ESP
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
WFD180453AXC
(Medium
High
3.0
1,353
25
1,290
26
1,246
27
1,199
28
1,149
29
1,116 1,116 1,099
Med
2.5
1,183
28
1,113
30
1,098
30
1,052
32
1,039
32
1,006 1,012 969
Med-Lo
2.0
980
34
946
35
920
36
900
37
896
37
885
855
804
Low
1.5
778
43
762
44
738
45
746
45
738
45
717
696
678
WFD180703AXC
(Medium)
High
3.0
1,290
40
1,236
42
1,194
43
1,166
44
1,176
44
1,166 1,108 1,029
Med
2.5
1,139
46
1,090
48
1,035
50
1,063
49
1,063
49
1,020 962
895
Med-Lo
2.0
962
54
927
56
925
56
941
55
909
57
877
834
779
Low
1.5
787
66
776
67
763
68
744
70
723
72
690
641
581
WFD180904AXC
(Medium)
High
4.0
2,128
31
2,063
32
2,001
33
1,927
35
1,824
37
1,726 1,628 1,529
Med
3.5
1,840
36
1,788
37
1,745
38
1,689
39
1,625
41
1,550 1,470 1,364
Med-Lo
3.0
1,602
42
1,558
43
1,543
43
1,493
45
1,455
46
1,402 1,328 1,239
Low
2.5
1,277
52
1,252
53
1,244
54
1,229
54
1,214
55
1,179 1,141 1,079
WFD181155AXC
(Medium)
High
3.0
2,405
35
2,361
36
2,250
38
2,161
39
2,037
42
1,937 1,808 1,689
Med
2.5
1,880
45
1,838
46
1,794
47
1,734
49
1,677
51
1,568 1,510 1,401
Med-Lo
2.0
1,659
51
1,630
51
1,587
54
1,537
55
1,492
57
1,445 1,368 1,287
Low
1.5
1,472
58
1,454
59
1,404
61
1,366
62
1,326
64
1,300 1,228 1,139
WFM18
CFM and Temperature Rise vs. External Static Pressure
Model—Heating
Speed as Shipped
Motor
Speed
Tons
AC at
0.5"
ESP
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 Rise CFM Rise CFM Rise
WFM180453AXC
(Medium
High
3.0
1,739 19
1,656 20
1,601 21
1,551 21
1,513 22
1,460 22.83 1,413 23.59 1,353 24.64
Med
2.5
1,422 23
1,399 24
1,378 24
1,350 25
1,305 26
1,275 26.14 1,220 27.32 1,178 28.30
Med-Lo 2.0
1,207 28
1,213 27
1,197 28
1,169 29
1,158 29
1,131 29.47 1,103 30.22 1,068 31.21
Low
1.5
991
34
980
34
958
35
950
35
937
36
924
36.08 910
36.63 874
38.14
WFM180704BXC
(Medium)
High
3.0
2,097 25
2,068 25
2,012 26
1,939 27
1,869 28
1,795 28.89 1,718 30.18 1,631 31.79
Med
2.5
1,596 32
1,566 33
1,534 34
1,492 35
1,445 36
1,401 37.01 1,354 38.30 1,288 40.26
Med-Lo 2.0
1,380 38
1,356 38
1,328 39
1,303 40
1,274 41
1,239 41.85 1,192 43.50 1,127 46.01
Low
1.5
1,239 42
1,191 44
1,165 45
1,133 46
1,104 47
1,082 47.92 1,040 49.86 996
52.06