

NPE-180S2 - Condensing Tankless Water Heater - 150,000 BTU
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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 8.4 gallons per minute at a 35°F 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 2" venting up to 60 feet and 1/2" gas line capability up to 24 feet, 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 35°F 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: 2" PVC up to 60 feet
- 1/2" gas pipe capable up to 24 feet
- Gas connection: 3/4" NPT
- Water connections: 3/4" 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
Returns & Refunds
My plant arrived damaged or wilted — what do I do?
Email us at contact@shaqwayaliving.com within 24 hours of delivery with photos of the plant and its packaging. We'll send a free replacement or full refund. See our Returns & Refunds Policy for details.
Can I return a plant if I just change my mind?
Live plants aren't returned for change of mind — the 24-hour arrival guarantee covers quality and transit issues instead. Planters and plant-care accessories can be returned within 30 days for any reason.
How long do refunds take?
Once your return or claim is approved, refunds are processed within 5 business days to your original payment method. Your bank may take a few extra days to post the funds.
Shipping
How much does shipping cost?
Shipping is free on all orders, to both the US and UK.
How long will my order take?
Orders are prepared for shipment within 1–2 business days. Delivery then typically takes 2–4 business days within the US. See our Shipping Policy for UK delivery times and customs information.
How are plants packed for shipping?
Every plant ships in insulated, weather-aware packaging with moisture control and leaf protection, adjusted to conditions on your route, to keep it healthy in transit.
Can I track my order?
Yes — you'll automatically receive a tracking link by email once your order ships.

NPE-180S2 - Condensing Tankless Water Heater - 150,000 BTU
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