[mulligan]

Originally Posted by l2ridehd

I use solar and gas heat and the pool maintains 85 degrees without huge gas bills.

Geothermal is not used usually because of the initial cost of installation. It still uses a heat exchanger as the main heating/cooling system. Cost to install can run from 30K to 100K depending on the size of the system. And the payback time is measured in decades.

I was personally involved in installations of geothermal in 2 condo complexes in Collier county. Not over $7,000 for either one, and the payback was about 18 months. They were used to heat spa and pool (pool at 82, spa at 102) to replace gas heaters like we have here.