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A.O. Smith ProLine XE ATO-310U Non-Condensing Outdoor Tankless Water Heater, Natural Gas

A.O. Smith ProLine XE · 190k BTU · Natural gas

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A.O. Smith ProLine XE ATO-310U Non-Condensing Outdoor Tankless Water Heater, Natural Gas
A.O. SmithNatural gasOutdoorOut of stock
190k BTU6.880.81SupplyHouse.com$1,379$202todayView deal

$/GPM is the price divided by the hot water flow the heater delivers at a 45 °F temperature rise, worked out from its gas input and UEF. "Box GPM" is the maker's own maximum, often quoted at a much smaller rise, so it is shown but not ranked on. Your rise depends on your incoming water: the sizing calculator works it out from your ZIP.

Is it big enough for my house?

At full fire this heater puts about 153.9k BTU/h into the water. Enter your household and ZIP code in the sizing calculator: it works out how cold your water arrives in winter, the peak flow your showers and taps need, and whether this heater keeps up. Open the sizing calculator.

Install: needs a gas line sized for its full BTU input and a 120 V outlet for the controls.