wrote in message
oups.com...
I have a summer fan on my forced air furnace. It can be turned on to
blow fresh air into the house. I am thinking about replacing the fan
wih one that will turn blow in both directions so that at night I can
blow hot air out of the house. My brother has a whole house fan that
cools the house very well. Does anyone have an opinion about whether
reversing the summer fan will have a similar effect?


Where does this summer fan get the air from? If you mean to just run the
blower on the furnace, it will do nothing. If it is ducted to the outside,
it may help a little, but will not do what a whole house fan does. In order
to cool the house, you must vent out the hot air and suck in cooler air. I
don't know what you have now.