Serving as an alternative to a gas fired heater, the AeroTemp heat pump transfers the heat from the outside air to your pool. Compared to gas, oil, or electric heaters, AquaCal heat pumps draw up to 80% less energy, providing the most energy efficient pool and spa heating available. Featuring Titanium Technology which offers you maximum strength, durability and performance, backed up by a warranty on the Titanium heat exchanger for the life of your heat pump.