I think you would probably have a problem with rain getting in since the louvers aren't water tight. Maybe you could use something like a saucer sled as a rain cap but then you are redesigning the whole fan. They make fans designed to mount on the roof already.
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MaxxAir Ventamatic Exhaust Fan with Shutter, 18in., 3,000 CFM, 115 Volts, Model# IF18UPS

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Shipping:
Factory shippedStore Pickup:
Not available - online only
- Rough end opening: 20 3/4in. x 20 3/4in.
- Moves up to 3,000 CFM
- Rust-resistant galvanized steel housing with removable interior grille
- Pre-drilled holes on flange and rolled flange edges for safe and easy installation
- Automatic shutter prevents drafts from entering through the external opening
Prop 65 Warning: See Details
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) Exaust Fan with Integrated Shutter
Downloads

Features + Benefits
- Rough end opening: 20 3/4in. x 20 3/4in.
- Moves up to 3,000 CFM
- Rust-resistant galvanized steel housing with removable interior grille
- Pre-drilled holes on flange and rolled flange edges for safe and easy installation
- Automatic shutter prevents drafts from entering through the external opening
- OSHA compliant grille and totally enclosed, energy efficient PSC motor
- Requires wiring to your building's electrical system and 10 sq. ft. of NFA intake ventilation
- Not intended to exhaust hazardous fumes or chemicals
- 1-year limited warranty
Key Specs
| Attribute | Specification |
|---|---|
item# | 517232 |
Brand | Maxx Air |
Manufacturer's Warranty | 1 year limited warranty |
Ship Weight | 36.2 LB |
Drive Type | Direct |
Fan Diameter | 18 in |
Air Delivery | 3,000 cfm |
Volts | 115 |
| Attribute | Specification |
|---|---|
Amps | 5.34 |
Hardwired | Yes |
Speeds (qty.) | 1 |
Primary Color | Silver |
Secondary Color | Silver |
Assembly Required | No |
Product Weight | 34.0000 lb |
Dimensions L x W x H (in.) | 13.1 x 24.1 x 24.1 in |
Reviews
Questions & Answers
Questions
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· 10 years ago
installation
Can this be mounted vertically say, in a ceiling rather than horizontally in a wall? I just dont want the louvers open all the time if i mount it this way.
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manster· 10 years ago
Helpful?
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ProductExpert35· 10 years ago
This unit was not designed to be mounted horizontally in a ceiling. When this fan is mounted vertically in a wall, the airflow created by the fan provides pressure adequate to make the louvers open. If mounted horizontally (in a ceiling), the force of gravity would cause increased resistance on the louvers forcing them to stay shut.
Helpful?
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· 15 years ago
Can this fan be reversed?
Hi, I need something like this, but needs to be able to go forward and reverse!
18" max dia.-
qfhi1· 14 years ago
No.
Helpful?
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ProductExpert36· 15 years ago
This fan can not be reversed.
Helpful?
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· 15 years ago
Can I attach vent duct to this fan?
I want to run the intake for the fan through a small amount of ducting so I can vent a laser cutter as well as the rest of the workshop with this fan. Is there a way to attach metal vent ducting?
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qfhi1· 14 years ago
no.
Helpful?
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ProductExpert12· 15 years ago
The MaxxAir exhaust fan does not allow for any ducting to be attached as this would stress out the motor.
Helpful?
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· 15 years ago
how do the shutters open with this fan?
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Steve33629· 15 years ago
the shutters are spring loaded and open upon switch activation
Helpful?
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ProductExpert9· 15 years ago
The shutters will open from the airflow when the fan turns on.
Helpful?
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· 3 years ago
What is the rated horse power of the motor?
1 answer-
ProductExpert6· 3 years ago
The fan would have a 5/16 horsepower motor.
Helpful?
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· 4 years ago
How many cubic feet can 1 serve?
1 answer-
ProductExpert6· 4 years ago
At 3000 CFM, this exhaust fan would cover approximately 300 square feet. The cubic feet would be determined by dividing the height of the ceiling into the square footage.
Helpful?
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· 4 years ago
Is this fan water resistant. As to use in a low Moisture area
1 answer-
ProductExpert7· 4 years ago
It is not considered water resistant. This exhaust fan can be used in a low moisture area.
Helpful?
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· 4 years ago
Can this item be mounted in a garage ceiling or does it have to be mounted to a wall? Does this item push air thru the shutters or draw air thru the shutters?
1 answer-
ProductExpert7· 4 years ago
This wall exhaust fan needs to mounted to a wall. The air being drawn in is what pushes the shutters open.
Helpful?
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· 5 years ago
How safe would it be to install in an area with a large propane tank and generator?
1 answer-
ProductExpert6· 5 years ago
If the fan would be exhausting any flammable fumes, it would would not be safe to mount it in the vicinity of the propane tank.
Helpful?
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· 5 years ago
Would this fan be ok to be used around paint?
1 answer-
ProductExpert6· 5 years ago
This fan would not be safe to use around paint. You would want an explosion proof exhaust fan, such as item #14771.
Helpful?
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Warranty
Manufacturer's Warranty
1 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Replacement Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Item # 517232
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Specifications
Direct
Direct
Direct
Direct
18 in
24 in
18 in
30 in
3,000 cfm
5,000 cfm
3,150 cfm
5,500 cfm
115
115
115/230
120
5.34
-
-
6.3
Yes
-
-
Yes
1
1
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1
Silver
-
-
Silver
Silver
-
-
Silver
No
-
-
No
34.0000 lb
-
-
69.0000 lb
13.1 x 24.1 x 24.1 in
-
-
14.1 x 37.5 x 37.5 in
-
0.33 HP
0.33 HP
0.5 HP



