Takagi Tankless Water Heater, Series: TK-510U, 199000 Btu/hr Heating, Liquid Propane/Natural Gas, 3/4 in MNPT Gas Connection, Electronic Ignition, 4 in Vent, Condensing/Non Condensing: Non-Condensing, 10 gpm, 0.81, 3/4 in MNPT Water Connection, 4 to 10-1/2 in WC Gas/15 to 150 psi Water, 100 to 160 deg F, Ultra Low NOx: Yes, Indoor/Outdoor: Outdoor, 13-3/4 in W x 9-1/2 in D, Commercial/Residential/Dual: Commercial/Residential
Field convertible from natural gas to liquid propaneEasy-link up to 4 units without a multi-unit controllerSafety features include freeze, overheat, surge protection and troubleshooting diagnostic codesComplies with ultra-Low NOx regulations of less than 14 ng/JMulti-link up to 20 units with a multi-unit controllerThe water heater shall use a commercial grade copper alloy, fin tube heat exchanger with quick release brass or bronze waterways