Reliance Water Heaters Commercial Water Heater Manuals
Select your Reliance Water Heaters model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Reliance Water Heaters commercial water heaters by model number
| Model | Description | Certified |
|---|---|---|
| RUF 100 199*E* 3BTH 199* 3** | 100-gallon commercial gas storage water heater | November 2021 |
| RUF-100-199-*E* 4BTH-199* 4** | 100-gallon commercial gas storage water heater | August 2025 |