The 540P series 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 allow you to customize pump operation to meet your needs while maximizing heater efficiency. The onboard computer modulates combustion to yield an up to 0.95 Uniform Energy Factor (UEF) while meeting the strictest gas emissions standards. As part of the high efficiency tankless family, the 540P series provides endless hot water while being environmentally friendly.
