We have a wood stove and it's one of the ways I rationalize living in this silly rural/suburban town I live in, because we can just use trees on our property. It doesn't heat any water, so the oil-fired furnace (which my parents have written off for modification) still has to heat the water. I was thinking of adding an air-to-water heat exchanger to the exhaust right after the stove and and plumb it into the existing hot water loop. Has anyone done anything like this?

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1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition