Navien NPE-180S2 Condensing Tankless Gas Water Heater (150,000 BTU, 8.4 GPM, 0.96 UEF)
SKU: NPE-180S2
Overview
Upgrade your home’s hot water system with the Navien NPE-180S2, an ultra-high-efficiency condensing tankless water heater designed for reliable, continuous performance. Delivering an impressive 0.96 Uniform Energy Factor (UEF) and up to 8.4 GPM, the NPE-180S2 ensures your household enjoys endless hot water on demand while significantly trimming monthly utility bills.
Built with Navien’s patented dual stainless steel heat exchangers, this unit offers superior resistance to corrosion and mineral buildup compared to standard copper designs. Whether you are replacing a bulky 40- or 50-gallon storage tank or outfitting a modern build, the NPE-180S2's compact, wall-hung footprint frees up valuable floor space indoors or outdoors.
Key Features
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Ultra-Condensing Efficiency (0.96 UEF): ENERGY STAR® certified to deliver peak energy savings, lowering your carbon footprint and qualifying for local energy rebates.
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Flexible Retrofit Capability: Operates efficiently on a standard 1/2" gas line up to 24 feet, eliminating expensive gas pipe upgrades in most tank-replacement installations.
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Dual Stainless Steel Heat Exchangers: Maximizes heat transfer and provides long-term durability with industry-leading corrosion protection.
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EZNav™ Digital Display: Multi-line backlit control panel provides intuitive text-guided setup, real-time operating metrics, and straightforward self-diagnostics.
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Cost-Effective Venting: Low exhaust temperatures allow the use of standard 2" PVC, CPVC, or polypropylene pipe up to 75 feet (or 3" pipe up to 150 feet).
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Dual Venturi & Field Convertible: Seamlessly convert between Natural Gas (NG) and Liquid Propane (LP) in the field with an included conversion kit.
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Expandable Performance: Supports cascading up to 16 units and common venting up to 12 units for high-demand residential or light commercial needs.
Technical Specifications
| Specification | Value |
| Max Input Rating | 150,000 BTU/h (Turn down to 10,000 BTU/h) |
| Energy Rating | 0.96 UEF (ENERGY STAR® Certified) |
| Max Flow Rate | Up to 8.4 GPM (@ 35°F Rise) / 4.3 GPM (@ 67°F Rise) |
| Heat Exchanger | Dual Stainless Steel |
| Fuel Type | Natural Gas or Propane (Field Convertible) |
| Venting Options | 2" PVC up to 75 ft / 3" PVC up to 150 ft |
| Gas Connection | 3/4" NPT (Compatible with 1/2" line up to 24') |
| Dimensions | 17.3" W x 27.4" H x 13.2" D |
| Installation | Wall-Mount (Indoor or Outdoor) |
The #1 selling
tankless water heaters.
Navien is now the #1 manufacturer of all gas tankless water heaters (condensing and non-condensing) in North America*
*According to BRG
| Ship Method: | Truck Freight Delivery (Learn More)
Self-Service Truck Delivery: A freight carrier delivers this item. We call it “Self Service” because you’ll need to move the package off of the truck yourself. You may want a friend or family member on hand for help. Liftgate Services: Standard “Self-Service” Truck Delivery requires you to move your items off the truck without any help. For only $50, our delivery service partners can be contracted to perform “Liftgate Services”, and bring the item(s) to the ground for you. One “Liftgate Services” fee of $50 will include all the items in your cart. Delivery Notes: Once your order is near, a rep from the shipping company will call and give you a 4-hour window to arrange for delivery. Sometimes freight carriers offer their own services. Once we send you your tracking info, you can call the carrier directly to get more info. |
| Ships To: | USA 48 States |
| Ship Time: | Leaves our warehouse in 1-3 days |
| Estimated Delivery Time: | 3-10 days after leaving our warehouse |
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