Also do not forget that if the humidity is left inside the house in the
warmer monts makes the air conditioner work harder to remove the humidity.
Part of the colloing effect of airconditioning is removing humidity in the
air, A big deal down here in the humid southeast.

A little more costly but some swear by putting in a heat exchager to
warm/cool the makeup air when using a makeup air system as metioned in the
previous post.

MC

"John Grabowski" wrote in message
...

"al" wrote in message
...
Help...have read in the past the exhaust fans in bathrooms generally
aren't
that effective.

In order for an exhaust fan to be effective it must have "Make up air".
The
air that is removed by the fan must be replaced in order for the air to
move. If you put an 80 cubic feet per minute fan in a totally sealed
room,
it will not do anything because there is no air coming in to replace the
air
that is being pushed out. This can be resolved by opening a window
somewhere in the house, installing a make up air vent, installing a fresh
air vent to your forced air furnace, etc.



In other words, by simply ensuring the door is left open
after a shower, as much humidity can be removed from the room as an
exhaust
fan could.

I live in Northeastern Wisconsin. Opening a window is not a year
round
solution. Am concerned with the efficiency (or lack of) an exhaust fan
during the winter months. I also have a teenaged daughter that believes
it's necessary to blow dry her hair for 20 minutes after her shower. So
not
only is the room a bit on the humid side, it gets heated by the dryer.

Would appreciate any thoughts/comments on the subject.

AL