Attic Fan & Cold Air


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Old 11-24-17, 12:19 PM
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Attic Fan & Cold Air

Happy Thanksgiving to all!
I'm not sure if I'm in the correct area to post this, If I'm not let me know and I'll move to the correct forum area. I need advice on what to do about my attic fan and the cold air that is coming in from the outside. My house is freezing and I can barely stand to be in the upstairs bedroom (where the attic fan is located) without dressing in Arctic gear!

Please see the attached photos of the outside vent and interior fan assembly. The fan itself does not work and hasn't for a number of years. I want to rip it out but also am not sure what to do. I also have a problem with the insulation in the house, it is burning hot in the Summer months and freezing in the Winter months. I think that means that there is not enough insulation but am really not too sure.

As for the fan and the duct opening on the outside of the house, what are my options to seal it up and keep the cold air out? I have tried sticking things up into the fan to try and limit the cold air intake, but as you can imagine it does not work. My house was built in 1941 and I am the third owner. I live on the South Short of Long Island, NY so we do get the cold ocean air flow.

Thanks in advance for taking a look at this post, any advice is greatly appreciated.
Regards,
Mike
 
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Old 11-24-17, 01:45 PM
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Those kind of dampers are very leaky. I would go to the attic and run some screws through some of blades so they can't come open . Then cover it with insulation. I wouldn't cover up the outside vents.
 
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Old 11-24-17, 03:47 PM
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The best alternative is to take the fan out and replace the ceiling, including insulation.

An alternative I did in my daughter's house was to seal the unit from air movement then build a box / cover over the unit using foam board insulation and tape.
 
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Old 11-24-17, 09:20 PM
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The fan is actually the easy part of the job. You have a home built in 1941 so you can be assured of minimal installed insulation. Is there any insulation in the attic ?
 
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Old 11-26-17, 09:08 AM
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Well it's not pretty but I think I did it! Thank you all for the information. I went with using some insulation strips, stapling them to the plywood then sealing with a lawn bag w/ duct tape. I didn't compress the insulation too much because I can still see the outside air expanding inside the plastic. The good thing is that I don't feel the cold air outside so so-far-so-good. We'll see when the temp really drops and the wind picks up!

I believe that the insulation inside the wall crawlspace has dissipated and needs to be removed and new insulation installed. I'm going to attempt in a week or two to remedy the problem. In the meantime, here's the finished product.
 
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