Vent flapper for exhaust fan

Panhead59 · Apr 23, 2021

What are ya'll using as a end of line outside "flapper" for your indoor exhaust fan ? My problem is I can't find a 6" one or any adaptors to go from 4" (which they all are ) to 6". I gotta use plexiglass or something simular in place of basement casement window. Brick house.

Aqua Man · Apr 23, 2021

Panhead59 said:
What are ya'll using as a end of line outside "flapper" for your indoor exhaust fan ? My problem is I can't find a 6" one or any adaptors to go from 4" (which they all are ) to 6". I gotta use plexiglass or something simular in place of basement casement window. Brick house.

Panhead59 · Apr 23, 2021

Tks aqua man. Lowes didn't have anything that would work but my local Ace hardware has a 6" to 4" galvanized adapter. I don't think it'll restrict air flow that much, besides, I think the fan and 6" set up is probably overkill to begin with !! Thank you sir !!!!!

Aqua Man · Apr 23, 2021

Panhead59 said:
Tks aqua man. Lowes didn't have anything that would work but my local Ace hardware has a 6" to 4" galvanized adapter. I don't think it'll restrict air flow that much, besides, I think the fan and 6" set up is probably overkill to begin with !! Thank you sir !!!!!

If ya can I'd go 6" to reduce wear on the fan from back pressure but sometimes you just gotta do what ya gotta do.

DistyDemon · Apr 23, 2021

A dryer duct can work. I use one for my ac exhaust in a custom plexiglass insert for a basement window.

MIMedGrower · Apr 23, 2021

I use something like this at the chimney end of my exhaust duct.
https://www.amazon.com/Draft-Blocke...cphy=9017485&hvtargid=pla-1165697561272&psc=1

Wh1teScorp1on · Apr 23, 2021

This is what I use. Found on Amazon. ca. They have different types and sizes

airedog · Apr 23, 2021

I used an earlier variant of a roof cap vent like the one shown below, mounted vertically in a plywood panel that fit in a sliding basement window with spray foam sealing the edges of the panel. There's a backflap damper and screen on the unit and i have a second one in the duct pipe for peace of mind.

Vent flapper for exhaust fan

Vent flapper for exhaust fan

Panhead59

Aqua Man

Panhead59

Aqua Man

DistyDemon

MIMedGrower

Wh1teScorp1on

Attachments

airedog

Privacy & Transparency

Privacy & Transparency