It also depends on how high off the ground you are. Be aware that (at least in Wisconsin) if you are more than 24" above ground to the floor of the room, you can't use a vinyl product like PGT Eze-Bre ... read more
My professional fireplace company has two options, of which we've implemented one for our clients in the past. If you want to essentially permanently block it off, there is something like an "air pill ... read more