Top Industry / Government
International Ground Source Heat Pump Association – The main accreditation organization of geothermal heat pumps.
Geothermal Technologies Program within the US Department of Energy.
The Geothermal Heat Pump section of Energy Star, which rates products based on energy efficiency. Only heat pumps that are Energy Star certified are eligible for the 30% federal tax credit.
Geothermal Help – Industry website providing consumer education, articles, featured projects, forums, etc.
Geothermal Heat Pump Consortium
Colorado Geo Energy Heat Pump Association
Michigan Geothermal Energy Association