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A. O. Smith Recirculating Pump


A. O. Smith’s new condensing tankless water heater features an integrated, powerful recirculation pump.

The 540P tankless model integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. The pump is easily controlled with a simple user interface and multiple pump settings, which allow for customized operation to both meet hot water needs and maximize efficiency.

The onboard computer modulates combustion to yield an impressive Energy Factor of 0.95, while meeting ultra-low NOx gas emissions standards. As part of the condensing tankless family, the 540P model uses up to 199,000 BTU per hour, providing instant hot water while being environmentally friendly. The 540P is ENERGY STAR® qualified.

The 540P is built with commercial-grade materials like marine-grade 316L stainless steel, giving it an industry-leading 15-year limited warranty.


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