Doing a little inspecting behind the surround panels and found it wide open. I've seen recent posts concerning, will look to somehow rectify with my installer and keep more btus in the house, another hearty thanks to this website !!
Update: I read https://www.hearth.com/econtent/index.php/articles/making_a_block_off_plate/, is there a certain gauge metal I should be thinking about, also any particular type of high temp. silicone ? . . .Thanks
Update: I read https://www.hearth.com/econtent/index.php/articles/making_a_block_off_plate/, is there a certain gauge metal I should be thinking about, also any particular type of high temp. silicone ? . . .Thanks