Duct work for kitchen exhaust fan


Old 09-27-20, 02:18 PM
Thread Starter
Join Date: Apr 2008
Posts: 6
Received 0 Votes on 0 Posts
Duct work for kitchen exhaust fan

I purchased my house about 3 years ago and there is an over the range microwave that is set to recirculate. I am purchasing a new over the range microwave and would like to run duct work. the wall that the microwave on is shared with the drywalled/insulated but unheated garage. I really don't want to build a soffit in the kitchen to run it to an exterior wall. The only other option is to run it into the garage into loft of the garage and out the roof or run it along the wall of the garage and out the wall of the garage. A few questions:

1) I am concerned that if I run it in the garage that condensation would form in the pipe.

2) If I run it along the garage wall and out the the wall I would use a down pointing vent cap about 16" below the soffit vent. The concern I have with this scenario is the vent would be right outside of the back
door of my house. Is there any code issues with this?

Thanks for the feeback.
Old 09-27-20, 03:11 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,876
Received 1,342 Votes on 1,240 Posts
The path of least resistance would be to go straight up and thru the roof.
XSleeper voted this post useful.
Old 09-29-20, 11:09 AM
ferd42's Avatar
Join Date: Jul 2020
Location: United States
Posts: 234
Received 17 Votes on 17 Posts
Termination must be ten feet from an opening.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: