Navien Tankless Water Heater: Hot water slow to reach fixtures – Navien NPE-2

Hot water slow to reach fixtures - Navien NPE-2 on a Navien tankless water heater: Long wait for hot water at the taps.

Homeowner with a tankless water heater problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Applies to: Navien NPE-A2 (built-in recirculation) and NPE-S2 condensing tankless water heaters: NPE-150S2, NPE-180A2/S2, NPE-210A2/S2, NPE-240A2/S2

Common causes of hot water slow to reach fixtures - navien npe-2

• No recirculation return line
• Recirculation mode not set

How to fix hot water slow to reach fixtures - navien npe-2: step by step

1. A2 models: use Internal Recirculation (2-way valve set to INT) for faster delivery, or External Recirculation (valve set to EXT) with a return line from the farthest fixture.
2. S2 models need an external pump and return line (or NaviCirc valve).
3. Set Menu > 1. Recirculation Settings to Always On, Intelligent, Weekly or HotButton.
4. Built-in pump limits on external recirculation: 100 ft equivalent of 1/2 in. copper or 500 ft of 3/4 in. copper; longer runs need an external pump.

If the unit shows an error code, look it up: Navien Tankless Water Heater codes

Models

Navien NPE-2

NPE-150S2NPE-180A2NPE-180S2NPE-210A2NPE-210S2NPE-240A2NPE-240S2

Navien NPN

NPN-120ENPN-160ENPN-160UNPN-180ENPN-180UNPN-199ENPN-199U