Navien NPE-240S2 Condensing Tankless Water Heater, 199,900 BTU, 11.2 GPM

The Navien NPE-240S2 is a condensing tankless water heater that turns 199,900 BTU/h of gas input into up to 11.2 GPM of continuous hot water at a 35°F rise. The S2 version skips the built-in pump for a lower price and a simpler install, which suits homes without a recirculation loop or with an external pump already in place. Dual stainless steel heat exchangers and an ENERGY STAR rating make it one of the most efficient ways to make hot water with gas.

• 199.9KBTU/h max input
• 11.2 GPMat 35°F rise
• 0.96 UEFcondensing efficiency
• NG / LPfield convertible

Why it earns its place on the wall

• Ultra condensing efficiency. A 0.96 UEF rating means more of every therm ends up in the water instead of the vent.
• Dual stainless steel heat exchangers resist corrosion for a long service life.
• EZNav controller with HotButton makes setup, diagnostics and on-demand recirculation simple.
• Lean and flexible. No internal pump means a lighter unit and fewer parts to service.
• Vents in 2″ or 3″ PVC and installs indoors or outdoors (outdoor vent kit sold separately).
• Cascades with Ready-Link for multi-unit commercial or large-home installations.

Specifications

Good to know

• Gas appliances must be installed by a licensed professional following the manufacturer’s installation manual and local codes. Manufacturer warranty terms depend on professional installation and registration.
• Specifications are from the manufacturer. Check the current spec sheet and sizing guide before ordering.
• Large units ship by ground freight. You will receive tracking when your order leaves.
• Questions on sizing or venting? Call +1 901-563-1990 or email support@mouchllc.com before you buy.