LAARS LXI POOL HEATER, 400,000 BTU, PROPANE, ASME — 82% efficient, Low NOx pool heater with digital controls. Fan assisted Low NOx combustion. Includes: digital display, dual temperature controls, bronze headers, and self-cleaning hot surface ignition system. Available for indoor or outdoor installation. Order indoor draft hood kit or high wind vent cap separately. ASME Certified heat exchanger. Cupro-Nickel Heat Exchanger units available for additional cost - inquire. 5 Year Limited Warranty.