http://www.snell-pym.org.uk/archives/2005/02/05/furnace-mark-3/ Sarah and Alaric Snell-Pym living in interesting times Tue, 06 Jan 2009 05:53:30 +0000 http://wordpress.org/?v=2.7 hourly 1 http://www.snell-pym.org.uk/archives/2005/02/05/furnace-mark-3/comment-page-1/#comment-1363 Derek Mon, 14 Feb 2005 18:17:04 +0000 http://snell-pym.org.uk/archives/2005/02/05/furnace-mark-3/#comment-1363 <p>well, the most efficient backyard furnace ever would probably have a heat exchanger on the exhaust gasses to pre-heat the air (saves another 30-50% of the energy). Maybe something to include in the Mark IV.</p> well, the most efficient backyard furnace ever would probably have a heat exchanger on the exhaust gasses to pre-heat the air (saves another 30-50% of the energy). Maybe something to include in the Mark IV.

]]> http://www.snell-pym.org.uk/archives/2005/02/05/furnace-mark-3/comment-page-1/#comment-1362 Derek Mon, 14 Feb 2005 18:08:38 +0000 http://snell-pym.org.uk/archives/2005/02/05/furnace-mark-3/#comment-1362 <p>well, the most efficient backyard furnace ever would probably have a heat exchanger on the exhaust gasses to pre-heat the air (saves another 30-50% of the energy). Maybe something to include in the Mark IV.</p> well, the most efficient backyard furnace ever would probably have a heat exchanger on the exhaust gasses to pre-heat the air (saves another 30-50% of the energy). Maybe something to include in the Mark IV.

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