Navien NPE-180S2 Condensing Tankless Water Heater
Navien NPE-180S2 - Condensing Tankless Water Heater - 150,000 BTU
The Navien NPE-180S2 is a high-efficiency condensing tankless water heater built to provide continuous hot water for residential homes. With an input range of 15,000 to 150,000 BTU per hour and a Uniform Energy Factor of 0.96, this unit is Energy Star certified and delivers reliable performance with reduced energy costs. It supports flow rates up to 31.8 L per minute at a 1.7 °C rise, making it well-suited for homes with multiple bathrooms or simultaneous hot water needs.
Engineered with dual stainless steel heat exchangers for enhanced durability and ultra condensing performance, the NPE-180S2 is designed for indoor or outdoor wall-hung installation. It includes the EZNav™ multi-line control panel with integrated HotButton™ control and supports cascading with up to 32 units using Navien’s Ready-Link system. Approved for direct venting, it supports 5.1 cm venting up to 1828.8 cm and 1/5.1 cm gas line capability up to 731.5 cm, offering flexible, space-saving installation options.
Features
- Up to 150,000 BTU/h input capacity
- 0.96 UEF and Energy Star certified
- Flow rate: 8.4 GPM at 1.7 °C rise
- Dual stainless steel heat exchangers
- Ultra condensing efficiency
- Low NOx emissions (20 ppm)
- Field convertible gas system (NG/LP)
- Indoor or outdoor wall-hung installation
- EZNav™ control panel with HotButton™
- Cascading capable with up to 32 units via Ready-Link
- Direct venting: 5.1 cm PVC up to 1828.8 cm
- 1/5.1 cm gas pipe capable up to 731.5 cm
- Gas connection: 3/10.2 cm NPT
- Water connections: 3/10.2 cm hot and cold
- 120V, single phase operation
Applications
- Residential homes with high hot water demand
- Multi-bathroom households
- Compact installations needing wall-hung systems
- Projects requiring venting and gas line flexibility
- Multi-unit cascade setups for greater capacity
Product Includes
- 1 - Wall Mounting Bracket
- 4 - Tapping Screw and Anchor
- 2 - Vent Terminator
- 4 - Wall Flanges
PNAV000021
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New and factory-reconditioned items are covered. See product details for warranty length.
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Most items can be returned within 30 days of delivery for a full refund, less original shipping costs. See our Refund Policy for full details.
Factory-reconditioned items are inspected and serviced by the manufacturer to meet original performance specifications, and are covered by warranty. Check this product's title and description to confirm its condition.
Yes. Manufacturer warranty terms apply as noted on this product page. Contact us if you need help with a warranty claim.
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Customer reviews
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Exactly what we needed
I was skeptical about the listed spec rating but it turned out to be more than enough for our needs. Noise level is lower than I anticipated, which matters a lot in an open-plan space. Great value for what you get.
Exactly what we needed
We needed a reliable water heater for a growing household and this one delivers. Noise level is lower than I anticipated, which matters a lot in an open-plan space. Can't imagine going back to what we had before.
Exceeded my expectations
We needed a reliable water heater for a growing household and this one delivers. Performance-wise it handles everything we throw at it without breaking a sweat.
Very pleased overall
Setup was quick and the water heater has worked flawlessly since day one. Instructions were clear enough that setup took less than twenty minutes. Worth every penny in our opinion.