How much hot water can it deliver?

Up to 10.1 GPM at a 35°F temperature rise. That covers several fixtures at once, though colder incoming water lowers the flow it can heat.

Does it need a recirculation pump?

No. ComfortFlow recirculation is built in, so it can return hot water to the fixtures without a separate pump.

Can it run on propane?

Yes. It ships for natural gas and is field convertible to propane with the proper conversion kit.

Can it heat a house as well as the water?

It can support space heating when the optional H2Air kit is added.

Can several units be linked together?

Yes. Up to 12 common-vented units can be cascaded to serve larger loads.

Does it need a drain for condensate?

Yes. As a condensing unit it produces condensate, so a drain line has to be routed.

Where can I buy the NPE-210A2 Condensing Tankless Water Heater?

11 stores we checked sell it, including SupplyStop.com, Goallo, coldsupp, Cool Gas Depot, Procuru.com.

NPE-210A2 Condensing Tankless Water Heater

Q: Where is the NPE-210A2 Condensing Tankless Water Heater cheapest?

At Goallo, for $593.50, 66% under what the other stores charge, as of our latest check.

Best price now

$593.50at GoalloChecked 1 h ago

66% under what the other stores charge

Compared across 11 stores. Prices are checked against each store and labelled with when.

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What reviewers say

Owners and installers describe the NPE-210A2 as a reliable high-capacity unit that keeps up with several fixtures and recovers hot water quickly thanks to built-in recirculation. Complaints center on installation complexity, condensate handling and the cost of service parts.

What people mention

Hot water outputPraisedOwners say it keeps up with multiple showers and appliances at once.
RecirculationPraisedBuilt-in ComfortFlow is credited with cutting the wait for hot water at the tap.
NoisePraisedReviewers describe it as quiet in normal operation.
InstallationCriticisedInstallers say the venting, gas line and condensate routing make setup a job for a professional.
CondensateCriticisedOwners note the condensate drain needs routing and upkeep.
Service costCriticisedSome owners report that parts and repairs are expensive.

About the NPE-210A2 Condensing Tankless Water Heater

The Navien NPE-210A2 is a condensing tankless water heater for residential and light commercial use. It has an input range of 12,000 to 180,000 BTU per hour and a Uniform Energy Factor of 0.95. It delivers up to 10.1 gallons per minute at a 35°F temperature rise.

It uses ultra condensing technology with dual stainless steel heat exchangers. The ComfortFlow system adds a built-in buffer tank, recirculation pump and controls. This lets the unit recirculate through an external recirc line or through existing supply lines with NaviCirc, with no external pumps or controls. The system is designed to reduce hot water wait times and the cold-water sandwich effect.

The unit is wall-hung and can be installed indoors or outdoors. It is field convertible between natural gas and propane. The EZNav control panel has built-in HotButton functionality. The unit works with NaviLink for remote control and can support space heating with the optional H2Air Kit.

Input

12,000 to 180,000 BTU/h

Efficiency

0.95 UEF, ultra condensing

Flow rate

Up to 10.1 GPM at 35°F rise

Heat exchangers

Dual stainless steel

Recirculation

Built-in ComfortFlow with buffer tank and pump; NaviCirc compatible

Control panel

EZNav multi-line panel with HotButton