AO Smith® 100281161 Tankless Water Heater With Integrated Recirculation Pump, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor/Outdoor: Indoor, Condensing, 10 gpm Flow Rate, Direct/Power Vent, 3 or 4 in Vent, 0.93, Residential

AO Smith® Tankless Water Heater, 199000 Btu/hr Heating, Natural Gas Fuel, 3/4 in NPT Gas Connection, Electronic Spark Ignition, Direct/Power Vent, 3 or 4 in Vent, Condensing Condensing/Non Condensing, 10 gpm Flow Rate, 0.93, 3/4 in NPT Water Connection, 15 to 150 psi Pressure, Yes Ultra Low NOx, Indoor Indoor/Outdoor, 17-3/4 in W x 11-1/4 in D x 23-5/8 in H, Residential

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Ultra-Low NOx gas tankless water heaters with condensing technology featuring an up to 0.95 Uniform Energy Factor (UEF) which lowers operating costs and is environmentally friendly.