Epools have access to a Heatpump that will satisfy your pool heating needs at an exceptionally cheap day to day cost to run.
Heatpumps work similarly to reverse cycle air conditioners. They use the difference between the water temperature and air temperature to transfer heat from the atmosphere to the pool water.
Heatpumps are connected inline with the existing pump and filter installation on the return to the pool. As a result, you do not have to install extra plumbing to the swimming pool, or, use dedicated pumps to operate the system.