Replacing attic fan with power vent fan

dws1June 27, 2012

I bought a "power vent" from HD with the intent of removing the fan from the shroud and placing it into the ceiling duct that housed the old fan. It fits perfectly with clearance for the fan to spin. However, in the manual it states to NOT install in any ducting. Does anyone know why I shouldn't install it to replace the old fan?

Thanks!

Thank you for reporting this comment. Undo
homebound

Is it really is a duct? If so, there will be too much resistance since they operate at a high speed. The motor will overheat, etc. It needs to vent to an open space, as well have enough replacement air (measured in sq. inches) from somewhere else (read the box to find out how much).

    Bookmark   June 27, 2012 at 5:55PM
Thank you for reporting this comment. Undo
dws1

Thanks Homebound...not sure if it's considered a duct. The housing is in the roof of the attic and vents directly outside through a venting area that sits below a cap to keep the rain out. Is this considered a duct? It then pulls air from the attic which spans the length of the house and has a set of louvers (sp?) or vented opening on each end though they are only about 3' X 2'.

Any thoughts given this info would be appreciated.

Thanks again!

    Bookmark   June 28, 2012 at 10:40AM
Thank you for reporting this comment. Undo
busboy

This is not a duct. You are simply replacing the fan/motor assembly. The shroud (cap) keeps the weather out but is not a duct. After replacing the assembly make sure the screen surrounding the top of the shroud is in place to keep the critters out. The louvers you are talking about are the gable vents. These are meant to be an exit for air coming into the attic from the sofit vents. They have fallen out of favor with newer construction as ridge vents, which go all the way across the peak of the roof are more eficient. These setups normally provide all the passive ventilation needed for an attic but I suspect a previous owner installed the power vent because of insufficient ventilation. Make sure your soffit vents (located in the flat area underneath your gutters are not blocked.

    Bookmark   July 2, 2012 at 10:18AM
Thank you for reporting this comment. Undo
dws1

Thanks busboy...think I'll return the power vent and either find a replacement that is marketed as such or just see how it goes. For all I know, the attic fan may have been inoperable for years. Also, was just talking to someone about ridge cents and will look into this when it's time to replace my roof as it seems like a very logical approach.

Thanks again!

    Bookmark   July 2, 2012 at 11:00AM
Sign Up to comment
More Discussions
how did gap between floor and wall close up by itself?
I have hardwood floors and there is/was a spot at the...
tlbean2004
Moss removal help!
Can anyone tell me how to effectively remove what looks...
nycbride07
Can you clear my doubt about home security system?
I have a home security system installed recently. Do...
jeckjiem
T1-11 siding: Replacing rusted z-flashing?
I have several questions about z-flashing for T1-11...
rogerv_gw
Heating tool
Picked this for free at an estate sale. Wood burning,...
tim45z10
Sponsored Products
MLB Tailgate Toss 2.0 Cornhole Set - 20TTM-100
$93.99 | Hayneedle
Integrity Bedding 5-inch Orthopedic Single-size Memory Foam Sofa Sleeper Mattres
Overstock.com
Fairmont Designs Rustic Chic 26" Vanity & Sink Set - Weathered Oak
Modern Bathroom
Savoy House Hyannis Transitional Ceiling Fan
1800Lighting
Capri 18-inch Outdoor Fan
Overstock.com
Castellon Coil Springs Chair
Ballard Designs
Quorum International Hudson Matte Black Fan Light Kit
$140.25 | LuxeDecor
42" Gloss White Cirrus Hugger Modern Fan Ceiling Fan
Euro Style Lighting
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™