Mike Hyatt wrote:I am hoping to warm up a draughty stone croft on the west coast of Scotland with a rocket mass heater, ideal as very little wood!, just getting the materials together and have a couple of questions, is the exhaust flue pipe diameter critical to 'draw' I am looking at 6" or 8"?
In the UK old oil drums only come in 45gal, so how critical is the gap between the heat riser a barrel, I am looking at 4" or 6" down the sides with a gap of 1 1/2"at the top? Any help on this welcome There is no store to pop into on the island, best if I get it nearly right at the start.
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