Hayward H150k BTU natural gas inground ground pool heater. Cupro-Nickle heat exchanger, 120v/240v split voltage electrical connection.Hayward H150 Digital Natural Gas HeaterSKU: H150FDN$3,100.00PriceQuantity*Add to CartTech Specs BTU Output: 150,000 Fuel Type: Natural Gas Heat Exchanger: Cupro Nickel Efficiency: 83% Ignition: Electronic Controls: Digital, dual thermostat Water Connections: 2" x 2.5" CPVC Unions Electrical: 120/240V required (5.5A) Emissions: Low NOx compliant. 29.3 " x 32 " x 27.5 " 2 year warranty. Heats up to 70,000L.