Use a 4 inch duct nothing less than 125cfm,s to make it worthwhile and
insulate the duct if you live where it snows
Joseph Meehan wrote:
Mark wrote:
Remi wrote:
I think you can get an adaptor that will connect the 4" to the 3".
It will make the fan a little louder than it should be, but if you
buy a good quality quiet fan it will be a lot quieter than the cheap
one you have now. Have you checked out the Panasonice "Whisper"
fans? They're the wuietest (and most energy efficient) on the
market. They're expensive, but good. Good luck.



bath exhaust fans are a bad idea anyway for a home...

in the winter they draw heated moist air outside,,,,instead... after
your shower, just open the inside door and keep that warm moist air in
your house..

in the summer, open a window...

if your using central AC in the summer, you are still better off
closing the AC vent in the bath and opening the window...

Mark

For the home as a whole, your comment makes some sense. However since
that warm moist air stuck in the smallest room in the house means mold and
mildew, they do make sense. Even your examples do not apply at all likely
combinations of conditions.

--
Joseph Meehan

Dia duit