I have a zero clearance wood burning fireplace insert that I dont like and I want to optimize it’s efficiency and safety. It has the crappy tempered glass doors with a screen but it allows smoke into the house since the glass doors have to be open so Im thinking about adding glass doors that are meant to be shut. I found a few retailers online, does this work with a zero clearance? My fireplace does have an outside air source vent so I think it would work. Am I on the right path or should I look into something else?