I have a brick fireplace in which I m installing a woodstove halfway inserted (not an insert).nd I would like to add a vent above the mantel to create a convection flow behind the stove up the flue some and through the vent back in the room.
The fireplace is a conventional red brick fireplace (in the basement) and incorporated within a CMU block wall. I d like to know what size hole I can safely make through the CMU wall and red brick flue without having to make any kind of reinforcement.
Any tips are welcomed. You can even let me know if this is worth the hassle.