The Raypak Digital Cast Iron ASME Natural Gas 399,000 BTU Pool Heater is a commercial-grade heater designed to meet ASME certification requirements for commercial installations. It features a microprocessor-based thermostat control for precise temperature settings and a digital display for easy monitoring. With a unique pagoda design, this heater is built to withstand high wind speeds and downdrafts, ensuring efficient operation. The galvanized metal cabinet with a 7-stage powder coating adds durability to this reliable pool heater.