An Inconvenient Truth About The Energy Performance of Geothermal Heat Pumps

By Trish Holder

My home is heated and cooled with a geothermal heat pump – also known as a ground source heat pump.  I was sold on the idea of geothermal heating and cooling for the same reasons that I suspect most homeowners are:

  • The promise of lower energy costs
  • The attractive renewable energy tax credits, which make it easier to come to terms with the rather exorbitant cost
  • The belief that this is truly a more environmentally responsible choice since geothermal heat pumps do not rely on combustible fuel
  • The “cool factor” associated with owning a geothermal system (This was not a major driver for me, but I do get a warm glow when people are impressed that I have a highly regarded technology in my home.)

I now question (and with good reason) the validity of the first and most significant incentive for purchasing a geothermal heat pump:  Lower energy costs.  Read more....

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