Originally Posted by matts37chev
i got a new furnace this year and saved the big squirrel cage fan from it for this purpose.
but now that i'm thinking about it, is this going to be too much exhaust fan?
will it be windy in there, or does the fact that you've built a room with only the furnace filters for intake, keep it from getting to much airflow?
the reason i ask is because i use a similar furnace/fan screwed into the rafters for heat in the garage and when it is on it gets down right windy under it.
I'd think too much was better than too little. If it's too much, simple duct work with adjustable side exhausts would allow extra air to blow out. If the fan is on the exhaust side, the same applies - adjustable ducting would allow it to pull air from the sides and reduce pull from the garage. I could make do with it!