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The Navien NPE-210S2 is a condensing tankless water heater for natural gas, rated at 0.96 UEF and up to 180,000 BTU/h input. It delivers up to 10.1 GPM at a 35°F rise and uses dual stainless steel heat exchangers for corrosion resistance. It is field-convertible to propane, cascades with other units and supports common venting of up to 12 units, which suits large homes and light commercial jobs. Against single-exchanger rivals it offers higher efficiency and easier multi-unit setups, but it needs 2-inch PVC venting and a gas supply sized for its full input.
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The Navien NPE-210S2 is a condensing tankless water heater that heats water on demand. It has a maximum input of 180,000 BTU/h and a Uniform Energy Factor of 0.96. This NG model runs on natural gas, and a field convertible gas system lets it be converted to propane.
It uses dual stainless steel heat exchangers and electronic ignition. The compact unit is wall-hung and can be installed indoors or outdoors. It is direct-vented and can be used in residential and light commercial settings. It is built for quiet operation.
The unit has a built-in HotButton and an EZNav multi-line control panel. It is cascading capable, and up to 12 units can share common venting. Safety features include a flame rod, an air pressure switch, and a vent installation detector.
