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Re: geothermal heating/radiant flooring/domestic hot water
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Posted by Robert Gammon on Tuesday, 29 April 2008, at 7:42 p.m.,
in response to geothermal heating/radiant flooring/domestic hot water, posted by Brad
I think that if you check the specs for both units, operating a single unit in BOTH heating AND cooling modes is NOT possible. It takes two compressors to do what you need.
DualTek and Envision are similar heat pumps. They can heat or cool the space using forced air. DualTek offers options that can cool the space using forced air and heat the space with radiant heat, BUT NOT BOTH AT THE SAME TIME!!
Both heat pumps can produce modest amounts of hot water thru their desuperheater outputs. This water will NOT be enough to heat a room with radiant heat, nor will it supply enough hot water for a household of two people.
It sounds like you need TWO or more Envision or DualTek units. Envision will only provide forced air heating and cooling. DualTek can provide radiant heat or domestic hot water (all you need) or forced air heating and cooling.
In school buildings, like many office buildings, part of the building needs heating, while parts near the core need cooling. It takes several heat pumps to satisfy both parts of the HVAC needs in structures like this. Residences almost never need to have both heating and cooling demands so a single heat pump like Envision or DualTek will suffice.
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