I have a central natural gas furnace. That uses the crawl space as the main cold air return.
Right now, if I just turn on the fan feature on the furnace, it does even out the temperature in the house a bit, but it is moving a lot of air and is rather loud.
I love how the woodstove makes nice quiet heat, other than the pleasant crackling sounds, which I like.
I would also like to get the heat as directly into the floor as I can, so fluid pipes in the floor seems like the way to go.
I would also like to get some thermal mass going in my system. The woodstove is pretty small, so it heats up and cools down pretty fast. If I had a drum of hot water in the crawlspace, it could potentially give off heat for hours after the fire is out.
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