NPE-240A2 Condensing Tankless Water Heater

Navien NPE-240A2 - Condensing Tankless Water Heater - 199,000 BTU

The Navien NPE-240A2 is a high-capacity, high-efficiency condensing tankless water heater engineered for residential and light commercial applications. With an input range of 13,300 to 199,900 BTU per hour and a Uniform Energy Factor of 0.95, it delivers up to 11.2 gallons per minute at a 35°F temperature rise. Its compact, wall-hung design allows for flexible indoor or outdoor installation and supports 2" or 3" venting for long runs, making it ideal for homes or businesses requiring reliable and continuous hot water.

This model features Navien’s patented ComfortFlow® system with a built-in recirculation pump and buffer tank to eliminate temperature fluctuations and minimize hot water wait time. Dual stainless steel heat exchangers enhance durability, while the EZNav™ control panel simplifies setup and operation. The NPE-240A2 supports cascading with up to 32 units and common venting with up to 12, and is field convertible for natural gas or propane use. With ultra-low NOx emissions and advanced safety features, it delivers efficient performance without sacrificing reliability.

Features

• 199,900 BTU/h input with 0.95 UEF

• Flow rate: up to 11.2 GPM at 35°F rise

• Dual stainless steel heat exchangers

• Built-in ComfortFlow® recirculation pump and buffer tank

• Field convertible gas system (NG or LP, kit included)

• Low NOx emissions (20 ppm)

• Indoor or outdoor wall-hung installation

• EZNav™ multi-line control panel with built-in HotButton™

• Cascading capable: up to 32 units

• Common venting capable: up to 12 units

• 1/2" gas line compatible up to 24 feet

• 2" venting up to 75 feet, 3" venting up to 150 feet

• 3/4" NPT gas and water connections

• Electronic ignition and VID safety feature

Applications

• Residential homes with high hot water demand

• Light commercial facilities needing continuous hot water

• Retrofits or upgrades to high-efficiency systems

• Indoor or outdoor wall-mounted installations

• Cascade setups in multi-unit buildings or large households