Quote:
Originally Posted by nokiasixteth
2 I thought about drilling either 1 loop hole for 1 ton 250ft deep and circulating water with some sort of controller so the intake temp would first go through a radiator and cool down before it came across the coils of the mini split.
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Your concept is correct, but the efficiency of this design would kill it. You would have to build a very tight duct system that would force the air through the radiator first, before entering the heat pump.
The real solution (voiding all warranties of course) is to plumb a refrigerant to water heat exchanger into the refrigerant line just upstream of the heat pump coils. These units DO exist and are designed for just such applications.
Generally, there are 3 types of these heat exchangers
- tube (a definite DIY possibility)
- flat plate (very compact)
- tank (another DIY possibility) Basically a swimming pool heat pump heater without the heat pump.
These heat exchangers don't have to do all the work. They would only assist the coils inside the heat pump compressor unit.