I used to work at place that installed this exact system. You can get an extra 2-3 months a year use of your pool in warm climates. It does work but we sold w

I used to work at place that installed this exact system. You can get an extra 2-3 months a year use of your pool in warm climates. It does work but we sold way more geothermal systems then these pool based systems. Issues: Building inspectors do not like it because it is non-standard. Copper is attacked by wet chlorine so you have to use stainless heat exchangers and plastic pipe. Pool filter must be constantly maintained to ensure the AC does not get clogged. If the pool is small, it can become very warm in august, almost like a hot tub.