GHPs are safe and clean because there are no combustion flames, no flues, and no odors; just safe, reliable operation year after year. And compared to most conventional HVAC systems, GHPs deliver constant comfort and improved humidity benefits, especially with 2-speed fan GHP systems. GHPs are quiet too; there’s no noisy outdoor compressor.

GHP systems themselves are environmentally friendly— when properly installed, there is no danger of GHPs polluting ground water sources. The fluid in the ground-loop heat exchangers is typically an environmentally safe, water-based antifreeze solution. A recent EPA analysis (“Evaluation of Consequences of Antifreeze Spills from Geothermal Heat Pumps,” undated EPA report released in late 1998, GPO#1998-615- 003/60624) found that the human health risk from ingesting groundwater contaminated by a GHP antifreeze leak is low.