How Do You Keep Cold Air Out Of A Range Hood?

 
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Old 01-22-2009, 01:36 PM   #1
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How Do You Keep Cold Air Out Of A Range Hood?


Never thought much about this before. Always just installed to specs and went on my way. This time, however, I remodeled my own kitchen and the vent-a-hood system lets so much cold air infiltrate down the ductwork that its quite cold around the stove area. You can feel the cold air just pour in. Are there dampers that can be installed in the system? Any solutions for a non-hvac remodeler? Thanks.
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Old 01-22-2009, 04:10 PM   #2
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Re: How Do You Keep Cold Air Out Of A Range Hood?


They sell exhaust outlets with gravity fed doors on them...when the exhaust is activated the door is pushed open....

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Old 01-22-2009, 04:37 PM   #3
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Re: How Do You Keep Cold Air Out Of A Range Hood?


Ok, right now I have a dual fan unit pushing I think about 650 cfm. Each fan has its own damper. Doesn't do much good. The vent is a roof mount on a 3:12 roof. Not sure if a damper would work there.
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Old 01-25-2009, 01:24 PM   #4
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Re: How Do You Keep Cold Air Out Of A Range Hood?




This is what you need...it has a lightweight flapper inside
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Old 01-25-2009, 01:55 PM   #5
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Re: How Do You Keep Cold Air Out Of A Range Hood?


You can usually find them at home depot or menards, braun makes them & has a damper that opens & closes.
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Old 01-25-2009, 02:22 PM   #6
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Re: How Do You Keep Cold Air Out Of A Range Hood?


I had the same problem. Mine is a 10" round duct and it took a while, but I found an in-line spring operated damper to augment the one on the exit shroud.
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Old 01-25-2009, 05:08 PM   #7
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Re: How Do You Keep Cold Air Out Of A Range Hood?


Thanks guys. I'll make a trip to the HVAC shop and see what they have. I didn't think that a rooftop damper would be pushed open by the air, but maybe they have something.
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Old 01-25-2009, 05:16 PM   #8
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Re: How Do You Keep Cold Air Out Of A Range Hood?


Quote:
Originally Posted by Mike(VA) View Post
Thanks guys. I'll make a trip to the HVAC shop and see what they have. I didn't think that a rooftop damper would be pushed open by the air, but maybe they have something.
Yep, same thing goes for bathroom exhausts.

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