AQUACAL HEAT WAVE – truly the benchmark for quality swimming pool heat pumps. With Microprocessor controls, digital temperature read-out, and internal by-pass water flow management the HeatWave XL is a technologically advanced unit. The heat exchanger is Titanium, the air coil is phenolic-epoxy coated to resist corrosion, the UV-treated high-impact plastic cabinet is impervious to deterioration, and the dual row evaporator coil is oversized making this one durable heat pump. Add the user-friendly feature of the patented AquaTop to keep out debris and divert cold air away from roof soffit, lockable control cover, easy-to-read digital display and whisper quiet fan for the very best in swimming pool heat pumps.