Here’s an insert I built, painted and distressed for my fireplace that seals the opening from heat loss in the winter and hot air entering in the summer. So keeping with the “green” concept, everything incorporated in this draft stopper was either recycled or reclaimed.
The wood was pulled from a dumpster while I was on a construction site. Not only was the wood being thrown out but it also bares the “Forest Stewardship Council” (FSC) certification which means it’s from a well managed forest. Simply put, there’s a plan in place so as not to trash a particular forest.