I remember a post on this site about a company who made custom backdraft preventers, there was a link to their website. I cannot for the life of me find it...any help would be greatly appreciated!
Also...what's everybody doing these days on their Harman PF100 install? I thinking gravity backdraft preventer on top of my new unit, but how do I install one on my existing furnace?
Also...what's everybody doing these days on their Harman PF100 install? I thinking gravity backdraft preventer on top of my new unit, but how do I install one on my existing furnace?