I built a simple hot wire foam cutter to make parts for a couple of projects. I wanted to slit a full sheet of 1.5 inch insulating foam in...

INDEX to the series This graph [click to enlarge] shows the big reduction in standby energy use between my old (blue) and new (red) water ...

Project description from Matt Janssen: [click any pic to enlarge] George, Here is a 3/16" laser-cut steel-framed parabolic trough ...