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Ground Source Heat Pump Compressor Life
I'm hoping to get some real-life information about compressor life in ground source heat pumps used in a cold climate. I'm working on a project for a church that's interested in the technology. Unfortunately, they've been spooked by some folklore that the typical compressor life is six years. My expectation is that they would be likely to last twice that or more in most cases. I'm aware of an apartment complex where compressor life is that bad on average, but its because the heat pumps they selected were not designed for ground source service! So ... what's the life expectancy like when units are appropriately rated for that service - and the ground source exchanger is adequately sized?
Thanks in advance!