This is a trick question, but would you cut a hole in your ceiling, thereby leaving an easy path for the air to travel from your home into your attic, then run your furnace all winter?
You would not, but if you install a whole house fan that does not seal well when not in use, that is exactly what you have done.
Any whole house fan you have us install will move air from the house into the attic.
Maybe some move air a little faster, but that is not the most important aspect.
When you are not using your fan because it is winter, you want it sealed up tight so it doesn’t leak warmed air into the attic.
That is the most important thing, even when you live in a mild climate such as Campbell or the surrounding area.
Some fans don’t have a damper at all.
They simply allow the warm air to rise through them.
Some fans have dampers that seal poorly.
How well they seal when not in use is the critical attribute you need to consider.
Otherwise you are wasting energy and money during the winter months.
This article is part of a series on how to cool your home without air conditioning.
And speaking of a whole house fan for your home ….. we would love to install one for you when you live in or near Campbell.