20:01, 26 July 2008Geometry guy (Talk | contribs)(71,473 bytes)(→Heating, cooling and ventilation: It should be noted that "it should be noted that" should not be noted in encyclopedia articles :)
12:57, 26 July 2008Dank55 (Talk | contribs)m(71,479 bytes)(undid wikilink to Solar hot carbon, a probably non-notable article ("although such a system has never been built"))