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Posted by HeatPro on February 13, 2007 at 22:14:06:
In Reply to: RE: Help locating hot water design course posted by Victor on February 13, 2007 at 21:33:23:
Wow! It's been some time since you looked for that. I've change the site a long time ago.
The positive and negative are at
http://www.heatpro.us/#Series