30 gallon, mobile home, sealed-combustion, natural gas/propane water heater, 30,000 btu, low nox emissions, ecofriendly green choice gas burner reduces nox emissions by 33%, piezo igniter allows for easy 1 hand pilot ignition without matches, pex dip tube, glass lined tank with anode rod protects against corrosion, noncfc foam insulation, factory installed pex polymer lined heat trap nipples, factory installed temperature & pressure relief valve, side taps for easy installation, water connection is located at the top of the tank, water connection size: 3/4", vent size: 3", rated storage volume: 29, first hour rating: 60 gallons, uef: 0.61, ef: 0.63, unit dimensions: 58"h x 18"d, meets hud requirements for manufactured housing, 6 year limited tank & parts warranty, 1 year labor warranty, for use with roof jack vent kit, tv# 219820, not included, but required for installation.