THE PERFECT HEATER FOR ANY POOL APPLICATION! Hayward"s NEW Universal H-Series Heater combines advanced technology with universal fit flexibility, making it the perfect heater for new or existing installation. This new design offers left-side or right-side electric, gas and water connections, with 110v or 220v electric hook up. Universal H-Series Heaters feature an easy to use digital LED control panel along with industry leading hydraulic performance for reduced circulation time and Low NOx emissions which meet all current California and Texas air quality standards. Built to last, each heater utilizes Silicon Nitride Hot Surface Igniters and Cupro Nickel Heat Exchangers for superior durability. 1-Year Warranty. NOTE: These heaters are for residential use only.heaters.