Hayward's induced draft heater for above-ground pools and spas combines state-of-the-art technology with ease of operation and superior performance. Featuring an electronic, direct spark ignition system and an energy-efficient FireTile® lined combustion chamber, the Hayward heater provides 100,000 BTU input, while delivering 81% thermal efficiency and quick heating. An integral induced draft system makes this heater completely impervious to any high wind situations. A one-piece copper header/heat exchanger provides for leak-free performance. And a simple plug-in 120 volt electric cord is provided for simple installation.