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Well, I'll try to get you some pics.

They call it "hydrothermal circulation". If it's done correctily, like mine you can operate this system with no circulation pump. You build a heat exchanger...

Look up "russian oven" or "russian stove". Not exactily state of the art, but the design is time tested and proven. I've seen setups with heat exchangers built in them to heat the hot water in the...

Get the biggest one you can safely install. Where does the chimney run? is it through the middle of the house, or off the side? If it runs through the middle, the chimney will heat up over time and...

A fireplace will never be as efficient as a freestanding wood stove. all the heat goes up the chimney. You can have one installed that uses your existing chimney and stands in the room away from the...