Standard Wall Mounting
Mounting Fan Directly to Wall
The split drawing below illustrates the typical ways of mounting fans directly to the wall when a wall housing or collar is not used.
For exhaust fans, there is a minimum dimension (M) which must be maintained between the propeller and damper or guard to achieve optimum performance (failure to meet this minimum dimension will result in loss of fan performance, increased noise and shortened fan and damper life). There is also a minimum required wall opening dimension (W.O.) to allow the venturi to fit into the wall opening.
See the chart at right for the minimum “M” and wall opening dimensions.
spacer |
| This installation may |
wall | guard | require a spacer (by |
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| others) between the |
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| fan and wall to achieve |
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| the minimum “M” |
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| dimension. |
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| Fans can be mounted |
| M |
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| directly to a wall |
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| only if the wall is of |
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| sufficient thickness to |
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| damper | meet the minimum “M” |
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| dimension as shown | |
wall | here. | |||
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Fan |
| M | Wall | ||
Size |
| Opening | |||
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8 | 6 | (152) | 101⁄2 (267) | ||
10 | 6 | (152) | 121⁄2 (318) | ||
12 | 7 | (178) | 141⁄2 (368) | ||
14 | 8 | (203) | 161⁄2 (419) | ||
16 | 9 | (229) | 181⁄2 (470) | ||
18 | 10 | (254) | 201⁄2 (521) | ||
20 | 12 | (305) | 221⁄2 | (572) | |
24 | 13 | (330) | 261⁄2 | (673) | |
30 | 13 | (330) | 321⁄2 | (826) | |
36 | 14 | (356) | 381⁄2 | (978) | |
42 | 15 | (381) | 441⁄2 (1130) | ||
48 | 16 | (406) | 501⁄2 | (1283) | |
54 | 17 | (432) | 561⁄2 | (1435) | |
60 | 19 | (483) | 621⁄2 | (1588) | |
72 | 19 | (483) | 741⁄2 | (1892) | |
All dimensions given in inches (mm).
Motor Side Guard
Protective guards of welded steel wire completely enclose the motor and drive side of the fan. Guards are coated with Permatector, a thermal setting polyester urethane. Other paint finishes are also available. Sizes 20 and larger only.
OSHA Motor Side Guard
Protective guards of expanded metal screen in structural steel frames are available to completely enclose the motor and drive side of the fan.
Weatherhood
Weatherhoods shield wall openings and dampers from rain and snow. Weatherhoods are shipped unassembled in kit form for field assembly. Construction is of galvanized steel with wire mesh birdscreen. Mounting flanges have prepunched mounting holes. 45° turn down is for exhaust and 90° turn down is for exhaust and supply. Options include aluminum construction, insect screen and painted finish.
Damper Guard
Damper guards meet the OSHA requirements completely enclose the damper or wall openings on the discharge side of the fan. They are constructed of expanded galvanized steel screen in galvanized steel frames. Mounting flanges have prepunched mounting holes. Options include aluminum construction and painted finish.
Dampers
Used alone or in conjunction with the wall housing or wall collar, a complete line of dampers is available for exhaust or supply configurations.
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