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.

enter image description here

enter image description here

1 Answer 1


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.

  • 2
    No gas in the house; electric only. I've just realized that the duct may be against fire code, being a hole connecting the interior to the garage. Plus it would turn into a heat loss. I just want to take the edge off. I may try an oil filter radiant heater.
    – Evil Elf
    Commented Jan 3, 2016 at 2:50
  • It was worth serious consideration anyway! Any furnace ducts that can be split-off? No violations in doing that.
    – ojait
    Commented Jan 3, 2016 at 4:08
  • With a heat pump, I think that would probably be a lost cost. Worse case scenario, I could use a ceiling mounted infrared heater just to heat each player between shots, but it would be nice if a radiant heater could bring the garage up to about 50/55 F.
    – Evil Elf
    Commented Jan 3, 2016 at 14:48
  • Maybe this: amazon.com/Optimus-H-9010-Garage-Ceiling-Utility/dp/B0041G69CM/… . or amazon.com/Vogelzang-BX22EL-Sweetie-Cast-Stove/dp/B002OMGYHA/… . Radiant kerosene heater keeps my shop warm, but needs an open air source,
    – ojait
    Commented Jan 3, 2016 at 16:42

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.