geo thermal

My next door neighbour is considering installing geo-thermal heating and cooling using a heat pump 20-25 feet away from my deck. Should I be concerned about the noise? I like things quiet. Any thought? Thanks.
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I have two geothermal units and nothing is visable outside.
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A geothermal system does not need an outdoor unit. The unit could be placed in his mome, in the garage or under the house. I built a room on the side of my house JUST large enough to hold the unit and provide room for servicing it (very small service area was needed).
Instead of coils that you blow outside air over to warm them (in winter) and cool them (in summer), you have the coils in the same unit as the compressor and you flow water over them to warm or cool them. In my case the water from the grould was about 55 F year around. Water is a vastly better heat transfer medium that air so the coils are MUCH smaller. Also, how hard is to ari condition when you are trying to pump heat from your home into a 55 degree medium that when when trying to pump it into 95 degree air (similar situation in winter).
On Fri, 29 May 2009 12:44:04 -0700, "RemiRemi"

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RemiRemi wrote:

The heat pump is placed inside on geothermal systems. You won't even know it is there.
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The outside equipment are tubes with working fluid (like antifreeze) running through them, buried deeply underground where the temperature is a constant 55 F all year. The fluid pumps summer heat into the ground, and extracts winter heat from the ground into the house. Fluid running through tubes buried deeply will not have surface noise.
Once the job is complete, you will have no effect.
However, be aware they will probably dig a vertical channel rather than horizontal, which means they will be digging a very deep channel into your neighbor's property, many feet deep. The digging will probably be noisy and may take a couple of days. It will also be unsightly until the hole is refilled and cleaned up.
Once done, you won't know it's there.
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