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The NHW-A is a great option for homeowners who want to save money on their energy bills, reduce their carbon footprint & enjoy faster hot water with no cold water sandwiches, thanks to the built-in recirculation pump and buffer tank. Choose NHW-AI if installing indoors, and NHW-AE for exterior installation.
The NHW-A series is the first non-condensing gas tankless water heater with our ComfortFlow® built-in recirculation pump and buffer tank, which means faster hot water (even at very low flow rates) and no more cold water sandwiches.
Navien’s fine-tuned recirculation system allows for internal or external recirculation, even without an external line or crossover valve. The result: you enjoy endless hot water more quickly, with no cold water intrusions.
The recirculation pump and buffer tank aren’t the only details that make NHW-A a leader in non-condensing tankless water heater technology. Additional benefits include:
| Navien NHW-A: 0.81 UEF | Traditional tank water heater: 0.58 - 0.61 UEF | Traditional non-condensing tankless: 0.81 UEF | |
| Patented NaviTech technology: stainless steel heat exchanger and stainless steel burner | Yes | No | No |
| Recirculation Pump & Buffer Tank | Yes | No | No |
| Maximum Power Consumption | 120W | 400W | 162W |
| Dimensions | 17.3"(W) x 25.2"(H) x 10.3"(D) |
~25" diameter x 59" (H) | Varies |
| Weight | 55 lbs. | 150+ lbs. | 55 lbs. |
| Venting Concentric | Concentric 3" x 5" | Varies 2" x 4" | Concentric 3" x 5" |
| Gas connection size | 3/4" | 1/2" – 3/4" | 3/4" |
The front panel of the NHW-AI model allows you to adjust temperature and control operations, including internal/external recirculation modes and recirculation timer. The NHW-AE model control panel is located inside the unit and comes with a remote controller.
Navien indoor non-condensing tankless water heaters with built-in recirculation pump and buffer tank can be cascaded to meet high demand
Available in NG or LP
Available in NG or LP
Available in NG or LP
Navien outdoor non-condensing tankless water heaters are ready for direct connection outdoor-rated wiring, and a recess box is available as an optional accessory.
Available in NG or LP
Available in NG or LP
Available in NG or LP
NaviLink & NaviLink Lite make it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink system attaches easily to any new or existing* Navien tankless water heater, combi‐boiler or boiler. NaviLink Lite is great for single residential units and magnetically mounts to the side of the unit or can easily be mounted on the wall. Also, NaviLink Lite does not require external power.
* Existing installations may require the purchase of a new main PCB and front control panel.
Available for Download
on IOS or Android
NHW-A series tankless water heaters have 5 recirculation modes: Internal, Always On, Intelligent Preheat, Scheduled, and On-Demand with HotButton™ (optional accessory). One button push activates the internal recirculation pump and gas-fired burner, heating water in the supply lines to deliver hot water faster, while saving water and money. HotButton is CA Title 24 compliant.
