My fireplace has two blowers behind grates in the brick. Fans behind these lower grates mix air with heated air from behind the firebox and kick out a serious amount of heat into the room. The heated air is forced out of the upper grates on each side of the fireplace.
I have created a golf simulator in my garage and am looking at heating options. Is having a mason create another tunnel/branch terminating in the garage, though the cinder block possible? The garage is located immediately behind the fireplace.
Best Answer
Depending on the skill of the mason, local building codes, the configuration of the fireplace ducts and the cost I'm sure a new duct is feasible.
What you may want to consider is it worth the price and disruption to the household. Also would it make more economical sense to have a separate heating unit for the garage?
A gas fired ceiling hung 50000 BTU furnace can be purchased new for under $500. It might be worth it depending on the cost for the mason th reroute the fireplace duct.