Pacific Blue Mechanical » Navien NHW-180SE Premium Non-Condensing Tankless Water Heater
The Navien NHW-180SE Premium Non-Condensing Tankless Water Heater is a high-efficiency outdoor tankless water heating solution designed for reliable on-demand domestic hot water performance. Built with NaviTech stainless steel heat exchanger and burner technology, this system delivers durability, stable output, and long-term efficiency for residential applications.
Its compact, space-saving design makes the NHW-180SE an excellent choice for retrofit installations where indoor mechanical space is limited. With its outdoor wall-mounted configuration, the unit eliminates the need for indoor venting while maintaining strong performance in all operating conditions.
The Navien NHW-180SE Premium Non-Condensing Tankless Water Heater provides consistent hot water delivery while helping optimize space usage and installation flexibility. Its outdoor design makes it particularly suitable for homes where indoor installation is not preferred or feasible.
The stainless steel heat exchanger and burner system ensure reliable performance and corrosion resistance, even under frequent demand cycles. Cascading capability allows multiple units to be connected for larger homes or higher simultaneous water usage.
Low NOx emissions help reduce environmental impact while maintaining strong heating performance.
| Item | NHW-180SE |
| Gas Input (Domestic Hot Water) | 10,700 - 180,000 BTU/h (3.14 - 52.74 kWh) |
| UEF (NG & LP) | 0.81 |
| Flow Rate - 35°F Temp Rise | 8.5 GPM (32.2 l/m) |
| Flow Rate - 45°F Temp Rise | 6.6 GPM (25 l/m) |
| Flow Rate - 67°F Temp Rise | 4.7 GPM (17.8 l/m) |
| Dimensions | 14.0" W x 23.0" H x 9.3" D (35.6cm W x 58.4cm H x 23.6cm D) |
| Boiler Weight | 65 lbs (29.5 kg) |
| Installation Location | Outdoor wall-hung |
| Venting Type | N/A |
| Ignition | Electronic ignition |
| DHW Water Pressure | 15-150 PSI (1.05-10.55 kg/cm2) |
| Natural Gas Supply Pressure | 3.5 " WC to 10.5 " WC (0.87 kPa to 2.61 kPa) |
| Propane Gas Supply Pressure | 8 " WC to 13 " WC (1.99 kPa to 3.23 kPa) |
| Natural Gas Manifold Pressure (min-max) | 2.6 " WC to 0.8 " WC (0.65 kPa to 0.2 kPa) |
| Propane Gas Manifold Pressure (min-max) | 4.9 " WC to 1.3 " WC (1.2 kPa to 0.32 kPa) |
| Minimum Flow Rate | 0.5 GPM (1.9 l/m) |
| Cold Water Inlet | 3/4 |
| Hot Water Outlet | 3/4 |
| Gas Inlet | 3/4 |
| Power Supply | 120V AC, 60 Hz |
| Normal Power Consumption | 81 W |
| Standby Power Consumption | 4 W |
| Anti-Frost Power Consumption | 114 W |
| External Pump | < 150 W, 1.5 A W |
| Fuse | 5.0 A |
| Casing Material | Cold rolled carbon steel |
| Heat Exchangers | Stainless steel |
| Safety Devices | Flame rod, APS, vent installation detector, ignition operation detector, water temperature high limit switch, power surge fuse |
Navien reserves the right to change specifications at any time without prior notice.
| Product | Warranty Type | Labor | Parts | Heat Exchanger |
| Residential* | Standard1 or Controlled Recirculation2 | 1 Year | 5 Years | 15 Years |
| Residential* | Uncontrolled Recirculation3 | 1 Year | 3 Years | 5 Years |
| Commercial or Combi4 | Standard1 or Controlled Recirculation2 | 1 Year | 5 Years | 5 Years |
| Commercial or Combi4 | Standard or Controlled Recirculation3 | 1 Year | 3 Years | 3 Years |
* Applies only to single family, residential locations.
1 Standard means there is no recirculation being used.
2 Controlled Recirculation means recirculation of the water through the water heater is controlled by either the water heater or an external aquastat.
3 Uncontrolled Recirculation: External pumps configured to circulate continuously through the water heater are subject to the uncontrolled recirculation warranty terms. An aquastat is the minimum pump control requirement for DHW or storage tank recirculation in order to maintain the full controlled recirculation warranty.
4 Combi refers to a combination potable water and space heating application. Water heaters cannot be used in space-heating-only applications or this warranty will be voided.
Pacific Blue Mechanical provides complete supply, installation, repair, and maintenance services for the Navien NHW-180SE Premium Non-Condensing Tankless Water Heater across Metro Vancouver. Whether you are upgrading an existing outdoor water heater or planning a new high-efficiency tankless installation, our licensed technicians deliver complete end-to-end service tailored to your property’s needs.
If requested, we can source and supply the NHW-180SE directly and manage the entire installation process from start to finish. This includes gas line connection (NG or LP), outdoor wall mounting, water line integration, system commissioning, safety testing, and performance optimization to ensure reliable and efficient operation.
Already have a Navien NHW-180SE installed? We also provide professional maintenance and repair services including system diagnostics, troubleshooting, flushing, descaling, burner servicing, leak checks, component replacement, and preventative maintenance to keep your unit operating efficiently and safely year-round.
If your system is experiencing issues such as inconsistent hot water, ignition failure, pressure fluctuations, error codes, or reduced performance, our experienced technicians can quickly diagnose the issue and provide the most cost-effective repair solution.
From full installations to emergency repairs and ongoing maintenance, Pacific Blue Mechanical delivers trusted workmanship and reliable hot water solutions for homeowners throughout Metro Vancouver.
The Navien NHW-180SE Premium Non-Condensing Tankless Water Heater is a premium outdoor non-condensing tankless water heater designed for residential use.
Yes. The NHW-180SE is specifically designed for exterior wall-mounted installation.
Yes. It is available for both Natural Gas (NG) and Propane (LP).
Yes. The system is cascading capable for higher demand applications.
Yes. It features low NOx emissions rated at 20ppm for environmentally friendly operation.
