In 1981, we purchased heat-pump equipment from American Geothermal. We are pleased to report that the equipment, after 15 years, is still operating efficiently - cooling and heating our water. Maintenance has been minimal over the years. We are adding another plant this year and have ordered another unit.

Gaines Pittinger
Ready Mix of Knoxville, Tennessee

 We are very pleased with the performance of the American Geothermal Air Blast system. American Geothermal's personnel met all installation deadlines. The system has been operating successfully under very severe conditions.

Ned Winkworth
Winkworth Transit 

I am pleased to report that we have made it through two summers and 70,000 yards of concrete without any major problems. The system allowed up to produce 70 degree concrete in Morrilton, Arkansas without ice.