The Direct Vent Gas Water Heater for Manufactured Housing--------------------------------------------------------------------------------Available Capacities:30, 40, and 50 gallon modelsAvailable Warranties:5-year limited tank warranty: 1-year limited parts warranty--------------------------------------------------------------------------------Features:No external vented door is required All combustion air comes from outside the home Provides maximum design freedom since it can be placed almost anywhere within the home Hot water outlet located at top Meets or exceeds National Appliance Energy Conservation Act (NAECA) requirements Certified for manufactrued (HUD) and modular construction Factory installed temperature and pressure relief valve - side location. Exclusive Rheemglas ® porcelain enamel tank lining resists corrosion and prolongs tank life. Field convertable controls for natural gas or LP operation Anode rod equalizes aggressive water action Cold water inlet - side connection allows for quick, economical hook-up Piezo ignitor - easy to light pilot