--Richard Bassler 01:34, 28 September 2010 (UTC) Good work! Page is organized very well and seems to be free of spelling/grammatical errors (except for that HTML error with the reference in the 'How it Works' section, but I'm sure that's an easy fix). Everything is readable and easy to understand. The only thing I can think to suggest is maybe a visual aid or two so you can actually see what the heat pumps look like.