Hey PC thanks ! Ground source heat pumps work great if you have a good unit and a experienced person installing it . However most companies just slap em' in and 5 yrs down the road your system doesn't work right because you have a leak . When you get a leak the price of fixing it is not very cost effective (ie....tearing up the floors and concrete . ) They are also very noisy and can have nuisance problems . Just my experience .
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