Cold weather damper for island exhaust
user-4145989
| Posted in Mechanicals on
I am looking for advice for a damper on the exhaust-side of my cooktop,island exhaust duct. The fan is 600 cfm and has a gravity damper just above the fan inside the hood meaning the 8″ duct between the damper and outside wall is filled with cold air leaking into the kitchen. I am looking into adding a second damper – probably mechanical that is wired to the hood motor, to open and close when the fan is switched on and off. My HRV guy told me to get a Broan MD8. Broan says no. Any help is appreciated. New home, Closed cell. Southern coastal Maine. HRV. Thanks!
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Replies
You can buy exterior wall caps that have a damper (gravity).
ex: https://www.famcomfg.com/wall-vents/exhaust.html
Tamarack's Cape Backdraft Damper is a good, passive product for your situation: http://www.tamtech.com/Backdraft-Dampers_c_10.html. It must be installed in an accessible location for regular inspection.
Peter,
Here is a link to an optional inline damper from GE:
http://products.geappliances.com/appliance/gea-specs/JXDA22
GBA has lots of previous Q&A threads on this topic, including these:
Looking for good quality 3.25" x 10" wall cap with backdraft damper for kitchen exhaust fan
Good range hood damper and thermal break?
What's a good damper for a bath fan/range hood vent?
What's the best kind of damper to install on a kitchen exhaust fan?
Thanks again Martin!
Please give my regards to Paul Biebel when you next see him.
Peter