The JXIQ heater sets the standard in pool and spa heating with unsurpassed energy-efficiency and optional cost-saving integrated bypass technology that diverts water flow away from the heater when there iss no call for heat. The JXIQ also features advanced automation compatibility with AquaLink® systems and iAquaLink control, for anytime, anywhere convenience, and an ultra-compact, lighweight design, that allows for faster and easier installation making it a top choice for pool owners.VersaFlo integrated bypass technology:The JXIQ with VersaFlo is the first and only water heater pool that automatically directs the flow of water through the heat exchanger when heat is needed and around the heater when heating is not needed allowing you to save money on the filtration pump electric bill.