
mkdutch
Feb 13, 2005, 11:09 AM
Post #16 of 16
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Re: [Jerry@Ajijic] What choice for heating?
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One way to dramatically increase the efficiency of a fireplace (log or gas) is to convert it to convection-aided operation. There are a lot of expensive units like this in the EUA, but it's also possible to have one custom-made at low cost. The idea is simple - hot air rises and cool air falls. Make a series of U - shaped tubes or channels to fit inside the "firepit", placed vertically on their side with the base of the U toward the back and the open end of the U facing the front. Bolt or weld them together using steel straps top & bottom with a small space between each U. Attach short legs that rest on the hearth Place (or make) a firegrate to hold burning firewood or gas logs or pipes. Strike a match. As the tubes/channels warm from the fire, the cooler air will be drawn into the lower openings, be heated by the fire, and expelled by convection out the top end. Some place fans to speed the flow of air, but I've found they weren't needed - even in Minnesota with below zero temps outside. Fireplaces are never very efficient, as a lot of heated air always escapes out the chimney - but in a moderate climate like Lakeside, this conversion should work well...and I'll bet a local metalworker supplied with dimensions and a rough drawing could whip one up in no time at all.
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