There are several reasons to consider a Geothermal Heat Pump. Comfort: Warm or cool air flows quietly through your home. No more cold spots and drafts other systems create. Efficient Heat & A/C: When measured against other heating systems, the heat pump provides the most energy bang for the buck! The heat pump system produces 3 to 4.0 watts of heating or cooling for every watt of electricity used. This ratio is called the coefficient of performance (COP) and equals 3 to 4. In comparison, oil and gas based systems have efficiencies of less than 100% or COP's of less than 1. Durability & Low Maintenance: Heat pumps have been shown to require 30-50% less maintenance than a fossil fuel-based heating & cooling system. Most geothermal systems will run without any repair maintenance for over 20 years. Simply change the air filter every three months! Low Domestic Water Heating Cost: All residential and many commercial heat pumps use an optional "hot water generator". This circuit can save 50-65% on water heating costs.