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Sidewall Propeller Fans • Exhaust, Supply and Filtered Supply
®
3
Fan
Size
Damper
Size
Square
Recommended Wall Opening (W.O.)
Square
M
Minimum
Filtered Supply Wall Housing Only
Figures 1
and 2
Figure 3 Figure 4 A B C Filter Quantity & Size
8 10 (254) 14¼ (362) 10½ (267) - 6 (152) - - - -
10 12 (305) 16¼ (413) 12½ (318) - 6 (152) - - - -
12 14 (356) 19¼ (489) 14½ (368) - 7 (178) - - - -
14 16 (406) 21¼ (540) 16½ (419) - 8 (203) - - - -
16 18 (457) 23¼ (591) 18½ (470) - 9 (229) - - - -
18 20 (508) 25¼ (641) 20½ (521) - 10 (254) - - - -
20 22 (559) 27¼ (692) 22½ (572) - 12 (305) - - - -
24 26 (660) 33¾ (857) 26½ (673) 33
3
⁄4 (857) 13 (330) 32
1
⁄4 (819) 63 (1600) 24 (610) 4 23
1
⁄4 x 16
1
⁄4 (591 x 413)
30 32 (813) 39¾ (1010) 32½ (826) 39
3
⁄4 (1010) 13 (330) 38
1
⁄4 (972) 65 (1651) 26 (660) 4 24
5
⁄8 x 19
1
⁄4 (625 x 489)
36 38 (965) 45¾ (1162) 38½ (978) 45
3
⁄4 (1162) 14 (356) 44
1
⁄4 (1124) 67
1
⁄4 (1708) 28¼ (718) 6 23
1
⁄4 x 22
1
⁄8 (591 x 562)
42 44 (1118) 51¾ (1314) 44½ (1130) 51
3
⁄4 (1314) 15 (381) 50
1
⁄8 (1273) 72
7
⁄8 (1851) 34 (864) 6 24
1
⁄8 x 25
1
⁄8 (613 x 638)
48 50 (1270) 57¾ (1467) 50½ (1283) 57
3
⁄4 (1467) 16 (406) 56
1
⁄8 (1426) 72
7
⁄8 (1851) 34 (864) 12 23
1
⁄4 x 18
3
⁄4 (591 x 476)
54 56 (1422) 63¾ (1619) 56½ (1435) 63
3
⁄4 (1619) 17 (432) 62
3
⁄8 (1584) 79
11
⁄16 (2024) 40
11
⁄16 (1033) 12 23
1
⁄4 x 20
3
⁄4 (591 x 527)
60 62 (1575) 69¾ (1772) 62½ (1588) - 19 (483) - - - -
72 74 (1880) 84¾ (2153) 74½ (1892) - 19 (483) - - - -
All dimensions given in inches (millimeters). Filters are 2 inch (51 mm) nominal thickness. Above filter sizes are actual dimensions.
M
W.O.
W.O.
W.O.
M
W.O.
W.O.
W.O.
Figure 1 - Wall Housing Installation Figure 2 - Wall Collar Installation
Figure 3 - Direct to Wall Installation Figure 4 - Filtered Supply Wall Housing Installation
M
W.O.
W.O.
W.O.
Filters
Wall
Housing
Filter
Section
INTERIOR
Wall
EXTERIOR
Optional 90º
Weatherhood
Filters
Airflow
Optional
Damper
Wall
A
C
B
24 in. 15 in.
Pre-Installation Checks
• Check chart below for correct wall opening
dimensions.
• Check motor voltage and amperage rating for
compatibility with electrical supply. Supply wiring
must be properly fused and conform to local and
national codes.
• Motor load amperage must be checked and
compared to nameplate rating to avoid serious
damage to motor when speed is increased.
Wall Opening Requirements
Wall opening size and propeller-to-damper distance
are two important dimensions for fan installation.
Fans mounted to the wall require a different wall
opening (W.O.) size than those mounted in collars or
wall housings. Propeller-to-damper distance (M) is
important to reduce turbulence and damper flutter
which may lead to premature damper failure.
Figure 1 and 2 show the wall opening (W.O.) required
for installations with either a wall housing or collar.
Figure 3 shows the recommended wall opening
(W.O.) and the minimum distance (M) suggested
between the fan and damper for direct to wall
installations.
Figure 4 shows the dimensions and wall opening
(W.O.) required for installations with a filtered supply
wall housing.