Howard installed my horizontal geothermal system in Vancouver in 2001 and it has worked well.   The dual inside heat pumps share the radiant floor heat load and each cover one floor for air conditioning for comfort and energy efficiency.  A third, smaller heat pump, works off the same geothermal loop and generates all of our domestic hot water.  This system is very efficient and has saved much money and has been a very good investment in my home.  Hendrickson HVAC has been very adept performing the small amount of maintenance that this system has required in the eight years that it has been operating and I am very pleased with their work.
 
Carl K