Jandy LJ Heater Model 175,000 BTU, Natural Gas. Jandy's expertise in electronics has been added to the design of the technologically advanced Lite2 heater. Its easy, programmable features make life around the pool more enjoyable.Built for dependability and efficiency, the Lite2 is one of the most reliable heaters on the market. High-performance insulation and efficient operation make this heater an excellent value. The LJ model features a liquid crystal digital display with programmable pump control, dual temperature controls, built-in freeze protection and heater diagnostics. Self-cleaning, hot surface ignition, which provides quick start-up every time and prevents sooting. Copper heat exchanger and Flo-Thru baffles allow for efficient heat transfer, lowering your operating costs and extending your swimming season! Ceramic fiber combustion chamber contributes to a lighter weight and more compact design.