Adding foam injection insulation to older Arizona homes could be a gamechanger during the summer months. Here's why.

An update to an earlier DI that can "flip on and flop off" 48 VDC via a pushbutton, this time with high-side switching and a single ground.

According to the Energy Department, turning thermostats back 7 to 10 degrees for eight hours a day can save as much as 10% a ...