Scavenging Heat from Gas Fireplace Chase
I’m installing a new gas fireplace. DirectVent 4/6 with 14′ of near straight vertical pipe. Primary reason is design considerations and aesthetics. Secondary is my wife wants lots of heat on a switch to heat up our main area. The our hydronic heat doesn’t react quick enough for big temp swings. I also just like a big, centrally located mantel.
Anyway, I’ve got a little 18,000btu unit that at elevation is probably significantly less than that, but man does it crank out some heat.
I’ve got a blower for the firebox that helps bring that heat out into the room.
But the fireplace chase itself will get fairly warm. Despite the loose fit firestop at the ceiling, there is just not enough airflow to cool that space (12″ deep, by 60″ wide, by 12′ tall) and the pipe get pretty warm.
I don’t mind the warmth of the pipe – I trust my distances to combustibles – but I’m also burning gas that’s just going to warm up my fireplace chase – not my room.
Could I vent the chase into the conditioned space some way to scavenge heat from that area and improve vent cooling?
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