The NRCR has a built in recirculation pump which is great for homes with an existing recirculation line or even retrofit homes which can utilize an accessory.
(Measure Guideline : Transitioning to a Tankless Water heater, DOE, Sept.2012).The built-in recirculation pump allows the NPE-A2 tankless water heaters to recirculate water through an external recirc line or through existing supply lines while using NaviCirc®, without the need for external ...
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A pump at the tank or tankless heater, or installed under the sink, forces the lukewarm water from the hot supply line into the cold supply line. If a dedicated return line is used it returns the lukewarm water to the heater. A sensor/switch (Aquastat) built into the pump or an Aqua...