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The Navien NPE-240A2 is a condensing tankless water heater that runs on natural gas or liquid propane and is field-convertible between the two. It fires from 19,900 to 199,900 Btu/hr and reaches 96% efficiency, with a maximum flow rate of 11.2 gpm and dual stainless steel heat exchangers built to resist corrosion. It suits households replacing a tank or upgrading to condensing, where its high flow and sealed-combustion venting compete well against older non-condensing units. Owners and installers praise its output and efficiency; the common complaints are the cost of professional installation and the maintenance a condensing unit needs.
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Installers and owners generally rate the NPE-240A2 highly for its output, efficiency and quiet operation. Complaints center on installation cost and the upkeep a condensing unit demands.
The Navien NPE-240A2 is a condensing tankless water heater. It runs on natural gas or liquid propane, and the gas system is field convertible. Its heating capacity ranges from 19,900 to 199,900 Btu per hour.
It has dual stainless steel heat exchangers in a compact body, and its materials and design resist corrosion. The unit uses condensing technology and has an efficiency rating of 96%. It lights with an electronic ignition and has a flow rate of 11.2 gpm.
