Quote Originally Posted by bayou bud
Check with a local a/c mechanical contracting company and see about what's called a fire damper... install it behind where your vent louvers are, if and hopefully not , a fire breaks out these dampers shut thus sealing the room , no air in or out .... a few dollars for security... imo
That is a great idea!
I would do that for sure if I wasn't using the air exchange fan.

Thanks!