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Joseph Meehan

wrote:
The house is supposidly air tight so a duct was installed from the
outside of the house to the interior closet that has the furnace... in the
summer, the theory goes, I can use the fan on the furnace to pull
fresh cooler air in. It doesn't work that great.

Since the house is air tight, where is all this air going???

It sounds like you have a small duct to supply combustion air for the
furnace. The amount of air that might bring in during the summer is so
small at to be immaterial.

If you want to be able to cool you home like your brother, then get what
your brother has, an whole house fan and open the windows to let the air in
and it will be exhausted via the vents in the attic and roof.

--
Joseph Meehan

Dia duit