Propper microwave kitchen fan exhaust outside cover
#1
06-23-19, 07:51 PM
Propper microwave kitchen fan exhaust outside cover
My current kitchen exhaust fan cover seems to be stuck closed. The damper doesn't swing nicely anymore. Granted, the air pressure from my microwave isn't great. However, I want to start with installing an appropriate, working outside cover
Currently, I have a something that looks like this:
https://www.amazon.com/Builders-Best...erz_origin3-20
What is commonly used for kitchen/microwave exhaust? Does it need to be metal or can it be a plastic louver? Given my microwave fan power I need something that opens easily.
Currently, I have a something that looks like this:
https://www.amazon.com/Builders-Best...erz_origin3-20
What is commonly used for kitchen/microwave exhaust? Does it need to be metal or can it be a plastic louver? Given my microwave fan power I need something that opens easily.
#3
06-24-19, 05:38 AM
Several different styles of covers are used including the one you linked. Just make sure you get the correct size. 4" is commonly used on clothes dryers but most kitchen exhaust hoods use larger.
#4
06-24-19, 06:28 PM
Ok. this project is evolving to disconnected duct.
I stuck in a small inspection camera and discovered that the duct was disconnected and fell down to inside ceiling. I was able to grab it and positioning it so that probably could install a new extension and cover.
The one I removed came with a 10" sleeve attached. I don't think I woudl be able to install such a model as I am afraid I woudl push back the inside duct or coudl not fix it to the duct.
So, I am thinking that I need a 9"extension, screw from the inside the duct to attach it to existing ducting, then attach cover.
Does this make sense?
What lengths of duct extension to they sell at hardware store?
And then I need to find again a 4" cover. Would this work?
https://www.genuinereplacementparts....SABEgL5YfD_BwE
Also, I had to rest the duct on the truss elements...
I stuck in a small inspection camera and discovered that the duct was disconnected and fell down to inside ceiling. I was able to grab it and positioning it so that probably could install a new extension and cover.
The one I removed came with a 10" sleeve attached. I don't think I woudl be able to install such a model as I am afraid I woudl push back the inside duct or coudl not fix it to the duct.
So, I am thinking that I need a 9"extension, screw from the inside the duct to attach it to existing ducting, then attach cover.
Does this make sense?
What lengths of duct extension to they sell at hardware store?
And then I need to find again a 4" cover. Would this work?
https://www.genuinereplacementparts....SABEgL5YfD_BwE
Also, I had to rest the duct on the truss elements...
Last edited by PJmax; 12-15-19 at 05:59 PM. Reason: resized picture
#5
06-25-19, 05:37 AM
It's pretty rare that you can make up an entire duct run with factory lengths. You might have to cut the duct to the length needed. Use a pair of tin snips on the wide end, non-fluted to cut it to whatever you need.
#6
06-25-19, 08:57 AM
Will do. Went to a big box store for the outside cover. They had the same model that I had, which seems rather cheaper build quality. 4" dia limits the choices. Like a quality flapper with a spring.
There are lots of plastic models as well. Does code generally allow plastic?
There are lots of plastic models as well. Does code generally allow plastic?
#7
06-25-19, 11:12 AM
Group Moderator
Yes.... plastic is allowed for the cover. Typically the damper (door) is just weighted for gravity closing. There usually isn't enough air flow to overcome a spring on the damper.
