Residential natural gas power vent water heater (PV2 FVIR high performance) 40 US gallons. Glass lined inner tank, insolated with 2" Greenfoam eco-friendly insulation. High efficienty burner 40000BTU, silicon nitride ignitor. Factory installed T&P relief valve, brass drain valve. Factory installed 3/4" NPT di-electric nipples. Model is certified from 0 to 5000 feet of altitude. Can be vented up to 140 feet with a 3 inch CPVC or PVC pipe. Better thermal efficiency, better energy factor, quieter. Stainless steel baffle provides higher efficiency and heat resistance. Re-settable high limit temperature cut-off switch on the door to improve safety. Six (6) year limited warranty against leaks and on component parts from date of installation.