Geothermal Heating & Cooling Systems, News and Info

DO YOU KNOW?

When was the first heat pump invented?
Patented in 1912

When was the first ground source heat pump invented?
Oct 25th, 1948 Life magazine features the "fireless furnace"

What is the earth's temperature in the Twin Cities?
48.7 degrees F

What is the heating capacity (per ton) of refrigerant capacity?
12,000 BTUH

What does BTUH stand for?
BTUH: British Thermal Units per Hour

What percentage of homes and business are heated with
geothermal in the USA?
One Percent

How many barrels of oil are we saving in the US per year
by using geothermal?
14 million barrels of crude oil per year