Sump Pumps - Bob Vila. "A secondary pump installed right next to the first is a good idea, especially if your basement has been converted to living space. If your primary pump fails or is overwhelmed, the back-up pump automatically takes over. For extra insurance, when the power goes out, as in a storm, a battery-powered back-up pump can cont pumping for up to 2 days... Combo packs exist w/2 or 3 pumps. Or install a water alarm and keep a spare pump."
Geothermal heat pumps, or ground source heat pumps (GSHP) have been around for more than half a century. The technology exploits the constant temperatures we find right below the Earth’s surface, either for heating or cooling purposes, and has significantly higher efficiency than electrical heating, furnaces or even air source he