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Re: geothermal heating/radiant flooring/domestic hot water
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Posted by Robert Gammon on Wednesday, 30 April 2008, at 8:58 a.m.,
in response to Re: geothermal heating/radiant flooring/domestic hot water, posted by Brad
Water Furnace has told me that a 2T W-W EW will keep a hot tub at the right temperature year round in the lower 48 states, outdoors.
Phil heats his house with a 3T w-w heat pump, radiant heat and DHW from one heat pump.
Whether a single heat pump will heat the building and deliver enough DHW depends on MANY factors.
1. How large a space are you trying to heat?
2. How much insulation does this space have from the outside weather?
3. How much solar gain will the space get from South facing windows?
4. How many people will use the DHW and what will they use it for?
5. How large a unit do you need and does any heat pump mfg offer a unit that large?
And for cooling
1. How large a space are you trying to cool?
2. How much insulation does this space have from warmer spaces (including the outside)?
3. How much solar gain will this space receive from south facing windows?
4. How many people and how much heat generating equipment will be in this space?
5. How large a unit do you need and does any heat pump manufacturer offer such a unit?
In schools with 20 or more teachers, many school districts have applied heat pumps as one per classroom. The teacher and students then determine what the correct thermostat setting is for each classroom. Its a system that works well.
These are the primary questions to answer, there are others as well. A trained professional heat pump installer knows what questions to ask, and how to apply the answers to a potential solution.
One possible path is to ask a certified installer to come out and prepare an estimate. You must tell him that you are SERIOUS about this and you KNOW that this is MORE expensive than the standard stuff (furnace + AC) that he installs every day in houses in your city.
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An exercise in Energy Smart, Not So Big living. www.OurCoolHouse.com - Ideas @OurCoolHouse.com
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This site is all about building a cool, energy efficient house, that makes maximum use of earth sheltered design, passive solar heating and cooling, geothermal exchange energy management, and right sizing of the house for it's designated use. The home's placement is on a south-facing hillside in Deep Creek Lake, Maryland. This site describes the design process, the technologies used and the expected results. We also have a comprehensive Links Page for anyone who is also interested in designing a similar project.