Navien Water Heater Manuals
Select your Navien model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Navien water heaters by model number
| Model | Description | Certified |
|---|---|---|
| NPE-180A2 | 150,000 Btu/h gas tankless water heater | February 2023 |
| NPE-180S2 | 150,000 Btu/h gas tankless water heater | February 2023 |
| NPE-210A2 | 180,000 Btu/h gas tankless water heater | February 2023 |
| NPE-210S2 | 180,000 Btu/h gas tankless water heater | February 2023 |
| NPE-240A2 | 199,000 Btu/h gas tankless water heater | February 2023 |
| NPE-240S2 | 199,000 Btu/h gas tankless water heater | February 2023 |
| NWP500S050AUMBNWP500 | 44-gallon heat pump water heater | April 2025 |
| NWP500S065AUMBNWP500 | 61-gallon heat pump water heater | April 2025 |
| NWP500S080AUMBNWP500 | 74-gallon heat pump water heater | April 2025 |