The October/November 2000 issue of Home Power has a comprehensive article on radiant floor heating. The author recommends 1/2" cross-linked polyethylene (PEX), attached to the bottom of flooring panels or cast in concrete. They recommend using static impeller drive pumps, suggesting that the 10 watt (12V 0.8A DC) version will circulate water at the desired rate through up to 600 ft of 1/2" tubing. 3.5 and 5 watt versions are also available, from Ivan Labs in Jupiter, FL, 561-747-5354. The current #80 issue of the magazine and other details are at www.homepower.com, maybe they would release the pdf's of the previous issue too if you asked. Now, it would be a neat trick to put solar collectors on the roof of my Globetrotter, but I don't know of anything with enough thermal mass that would keep the floor warm at night (and still be pullable with a reasonable vehicle). I have radiant heating in my shop floor and it's great -- a small 60,000 BTU gas boiler runs for about three hours in the morning and then comes on a few times during the day. -- David Josephson '64 Globetrotter project To unsubscribe or to change to a daily Digest, please go to http://www.airstream.net/vaclist/listoffice.html If replying back to this message, please delete all the unnecessary original text from your reply.
