On Aug 31, 12:15*pm, dpb wrote:
phil scott wrote:

...

geo thermal, using ground water for a heat source... very efficient.

There are closed loop systems as well...almost as efficient, less
complicated, less expensive unless there is water available easily.

yes, closed loop is almost always in my view a much better choice,
exceptions are in some
clean water mountainous regions, no sediment, lime stone etc.. but
granite.. those work well
with ground water cooling directly.

Less complicated depends on the brand and the installation...some
companies (such as carrier for instance) can make a wet dream into
rocket science with 9 computer boards in it.



I don't see the service issue as any significant difference from my
experience w/ the unit--

you are undoubtedly more than 100% correct...stated another way, 'not
inccorrect, but fully accurate'... or one could say you have stated
the pure truth of the matter... for *your system.

After 40 years in the business (and Im still in the business) I can
tell you that the reason water furnaces and other ground source heat
pumps after 30 years on the market still have less than a 1% market
share is because they are very often a massive pain in the ass, and
end up being replaced with more conventional equipment long before
they even remotely recover their original costs.

Having said that, I am also 100% sure you can find at least 500
contractors who will assure you that all they ever put in is ground
source heat pumps and have yet to see any with a problem.

so...my advice... google it up 'water source heat pump
reliability'...'water source heat pump market share'.

when something that good in theory (and in some applications, work
wonderfully) is not selling more than 1% of the market.... there are
reasons.... good reasons.


Phil scott

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