Rheem Water Heater Manuals — page 2
Select your Rheem model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
Rheem water heaters by model number
| Model | Description | Certified |
|---|---|---|
| ECEPH80 T2 RH350BM | 72-gallon heat pump water heater | February 2025 |
| ECEPH80 T2 RH375-SO | 72-gallon heat pump water heater | September 2026 |
| ECEPH80 T2 RH400-30 | 72-gallon heat pump water heater | September 2026 |
| ECEPH80 T2 RH400-SO | 72-gallon heat pump water heater | September 2026 |
| ECERTGH-S10I | 180,000 Btu/h gas tankless water heater | April 2024 |
| ECERTGH-S11I | 199,000 Btu/h gas tankless water heater | April 2024 |
| ECERTGH-S84I | 157,000 Btu/h gas tankless water heater | April 2024 |
| ECERTGH-SR10I | 180,000 Btu/h gas tankless water heater | April 2024 |
| ECERTGH-SR11I | 199,000 Btu/h gas tankless water heater | April 2024 |
| ECERTGH-SR84I | 157,000 Btu/h gas tankless water heater | April 2024 |
| ECOHS160IN | 157,000 Btu/h natural gas tankless water heater | April 2024 |
| ECOHS160IP | 157,000 Btu/h propane tankless water heater | April 2024 |
| ECOHS180IN | 180,000 Btu/h natural gas tankless water heater | April 2024 |
| ECOHS180IP | 180,000 Btu/h propane tankless water heater | April 2024 |
| ECOHS200IN | 199,000 Btu/h natural gas tankless water heater | April 2024 |
| ECOHS200IP | 199,000 Btu/h propane tankless water heater | April 2024 |
| ECOHSR160IN | 157,000 Btu/h natural gas tankless water heater | April 2024 |
| ECOHSR160IP | 157,000 Btu/h propane tankless water heater | April 2024 |
| ECOHSR180IN | 180,000 Btu/h natural gas tankless water heater | April 2024 |
| ECOHSR180IP | 180,000 Btu/h propane tankless water heater | April 2024 |
| ECOHSR200IN | 199,000 Btu/h natural gas tankless water heater | April 2024 |
| ECOHSR200IP | 199,000 Btu/h propane tankless water heater | April 2024 |
| PRO H40 T2 RH310BM | 36-gallon heat pump water heater | November 2024 |
| PRO H40 T2 RH310UM | 36-gallon heat pump water heater | November 2024 |
| PRO H50 T2 RH310BM | 45-gallon heat pump water heater | November 2024 |
| PRO H50 T2 RH310UM | 45-gallon heat pump water heater | November 2024 |
| PRO H65 T2 RH310BM | 59-gallon heat pump water heater | November 2024 |
| PRO H65 T2 RH310UM | 59-gallon heat pump water heater | November 2024 |
| PRO H80 T2 RH310BM | 72-gallon heat pump water heater | November 2024 |
| PRO H80 T2 RH310UM | 72-gallon heat pump water heater | November 2024 |
| PRO+G40-50P RH HE EC1 | 40-gallon propane storage water heater | November 2024 |
| PRO+G40-50U RH HE EC1 | 40-gallon natural gas storage water heater | November 2024 |
| PRO+G50-50P RH HE EC1 | 50-gallon propane storage water heater | November 2024 |
| PRO+G50-50U RH HE EC1 | 50-gallon natural gas storage water heater | November 2024 |
| PROP G40-50* CN HE | 40-gallon gas storage water heater | November 2024 |
| PROP G40-50* RH HE EC3 | 40-gallon gas storage water heater | November 2024 |
| PROP G50-100* CN HE EC3 | 50-gallon residential-duty commercial gas water heater | November 2024 |
| PROP G50-100* RH HE EC3 | 50-gallon residential-duty commercial gas water heater | November 2024 |
| PROP G50-50* CN HE | 50-gallon gas storage water heater | November 2024 |
| PROP G50-50* RH HE EC3 | 50-gallon gas storage water heater | November 2024 |
| PROP G50-76P CN HE | 50-gallon residential-duty commercial propane water heater | November 2024 |
| PROP G50-76U CN HE | 50-gallon residential-duty commercial natural gas water heater | November 2024 |
| PROP G50-76* CN HE EC3 | 50-gallon residential-duty commercial gas water heater | November 2024 |
| PROP G50-76* RH HE EC3 | 50-gallon residential-duty commercial gas water heater | November 2024 |
| PROPG75-100P RH HE EC3 | 75-gallon residential-duty commercial propane water heater | May 2025 |
| PROPG75-100U RH HE EC3 | 75-gallon residential-duty commercial natural gas water heater | May 2025 |
| PROPH40 T0 RH120-M | 36-gallon 120-volt heat pump water heater | November 2024 |
| PROPH40 T0 RH120-MSO | 36-gallon 120-volt heat pump water heater | November 2024 |