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Old 11-12-2010, 02:01 PM   #1
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Retrofitting wall vent on an OTR microwave/hood comb

We have a OTR microwave/hood combination that is 20 years old and going to be replaced. I have NEVER been able to use the hood fan because of an installation screwup by our builder. When they installed the wall vent, there was no damper. We have had to fill the vent/pipe with insulation otherwise, my kitchen is a wind tunnel from the consistent draft thru the vent. The outside wall vent is not your standard kitchen vent. It is a metal hood that was attached to the framing and stuccoed around. Removing it and replacing with a new one would require repairing the stucco which, we don't want to have to do. Is there any type of retrofitting that can be done? Is it possible to find/install just a damper?



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Old 11-12-2010, 06:53 PM   #2
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Retrofitting wall vent on an OTR microwave/hood comb

Need pictures. As for a damper, it would be on the outside enclosure.

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Old 11-12-2010, 07:57 PM   #3
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Retrofitting wall vent on an OTR microwave/hood comb

new otr will also have a damper on the exhaust
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Old 11-13-2010, 10:03 AM   #4
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Retrofitting wall vent on an OTR microwave/hood comb

yeah, if you had un-installed that org m/o you could have reversed the fan and that would have closed off the vent. all m/o are shipped for exterior venting-you have to change it for interior...no pictures of your setup but can't you tin snip that hood where it isn't stuccoed? that should expose the tube where you could then install-somehow-a correct hood. exhaust to the outside is SO much better than just dumping it back into the room-even though it has filters.
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