Spa Heat PumpsPool spa heat pumps are stand-alone units that utilize a technology that relies on a compressor and a fan to extract heat from the surrounding air. Afterward, the technology enables heat transfer to the spa water. Swim spa heat pumps are more efficient than heating, thereby reducing electrical energy consumption. Energy consumption reduces by 75% compared to that of the electric heater element. SPRSUN air source heat pump spa heaters are the most energy efficient way to heat your spa and swimming pool by saving up to 75% energy.