Raypak's Professional ASME Bronze Digital Cupro-Nickel heater is the perfect choice for pool and spa professionals, as well as homeowners who are looking for a heater with added durability. This pool and spa heater features a Cupro-Nickel heat exchanger with a polyester-coated, non-corrosive cabinet. This unit's hardy internals are reinforced by Raypak's patent pending ProTek Shield technology, making it one of the most durable pool and spa heaters on the market. Sporting a digital control panel and removable stainless steel burner tray, this heater offers a user-friendly interface while maintaining a sleek, modern design. The inclusion of a 125# pressure relief valve allows this heater to meet the ASME pressure vessel requirements demanded by code for commercial installations over 200,000 BTUH. Unit also includes a flow switch and T&P gauge, making it 50 state ASME compliant right out of the box!.