Rheem Water Heater Manuals
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 |
|---|---|---|
| CECOHS160IN | 157,000 Btu/h natural gas tankless water heater | April 2024 |
| CECOHS160IP | 157,000 Btu/h propane tankless water heater | April 2024 |
| CECOHS180IN | 180,000 Btu/h natural gas tankless water heater | April 2024 |
| CECOHS180IP | 180,000 Btu/h propane tankless water heater | April 2024 |
| CECOHS200IN | 199,000 Btu/h natural gas tankless water heater | April 2024 |
| CECOHS200IP | 199,000 Btu/h propane tankless water heater | April 2024 |
| CECOHSR160IN | 157,000 Btu/h natural gas tankless water heater | April 2024 |
| CECOHSR160IP | 157,000 Btu/h propane tankless water heater | April 2024 |
| CECOHSR180IN | 180,000 Btu/h natural gas tankless water heater | April 2024 |
| CECOHSR180IP | 180,000 Btu/h propane tankless water heater | April 2024 |
| CECOHSR200IN | 199,000 Btu/h natural gas tankless water heater | April 2024 |
| CECOHSR200IP | 199,000 Btu/h propane tankless water heater | April 2024 |
| CPRO H65 T2 RH310BM | 59-gallon heat pump water heater | August 2026 |
| CPROPH40 T2 RH350BM | 36-gallon heat pump water heater | February 2025 |
| CPROPH50 T2 RH350BM | 45-gallon heat pump water heater | February 2025 |
| CPROPH50 T2 RH375-SO | 45-gallon heat pump water heater | September 2026 |
| CPROPH50 T2 RH400-30 | 45-gallon heat pump water heater | September 2026 |
| CPROPH50 T2 RH400-SO | 45-gallon heat pump water heater | September 2026 |
| CPROPH65 T2 RH350BM | 59-gallon heat pump water heater | February 2025 |
| CPROPH80 T2 RH350BM | 72-gallon heat pump water heater | February 2025 |
| CPROPH80 T2 RH375-SO | 72-gallon heat pump water heater | September 2026 |
| CPROPH80 T2 RH400-30 | 72-gallon heat pump water heater | September 2026 |
| CPROPH80 T2 RH400-SO | 72-gallon heat pump water heater | September 2026 |
| CRTGH-S10I | 180,000 Btu/h gas tankless water heater | April 2024 |
| CRTGH-S11I | 199,000 Btu/h gas tankless water heater | April 2024 |
| CRTGH-S84I | 157,000 Btu/h gas tankless water heater | April 2024 |
| CRTGH-SR10I | 180,000 Btu/h gas tankless water heater | April 2024 |
| CRTGH-SR11I | 199,000 Btu/h gas tankless water heater | April 2024 |
| CRTGH-SR84I | 157,000 Btu/h gas tankless water heater | April 2024 |
| CXE50T10H45U1 | 45-gallon heat pump water heater | September 2026 |
| CXE50T10HS45U1 | 45-gallon heat pump water heater | September 2026 |
| CXE80T10H45U1 | 72-gallon heat pump water heater | September 2026 |
| CXE80T10HS45U1 | 72-gallon heat pump water heater | September 2026 |
| CXE80T10HS45UO | 72-gallon heat pump water heater | September 2026 |
| ECE G40-50U CN HE | 40-gallon natural gas storage water heater | November 2024 |
| ECE G50-100U CN HE EC3 | 50-gallon residential-duty commercial natural gas water heater | November 2024 |
| ECE G50-50U CN HE | 50-gallon natural gas storage water heater | November 2024 |
| ECE G50-76U CN HE | 50-gallon residential-duty commercial natural gas water heater | November 2024 |
| ECE G50-76U CN HE EC3 | 50-gallon residential-duty commercial natural gas water heater | November 2024 |
| ECE H40 T2 RH310BM | 36-gallon heat pump water heater | September 2026 |
| ECE H50 T2 RH310BM | 45-gallon heat pump water heater | September 2026 |
| ECE H80 T2 RH310BM | 72-gallon heat pump water heater | September 2026 |
| ECEPH40 T2 RH350BM | 36-gallon heat pump water heater | February 2025 |
| ECEPH50 T2 RH350BM | 45-gallon heat pump water heater | February 2025 |
| ECEPH50 T2 RH375-SO | 45-gallon heat pump water heater | September 2026 |
| ECEPH50 T2 RH400-30 | 45-gallon heat pump water heater | September 2026 |
| ECEPH50 T2 RH400-SO | 45-gallon heat pump water heater | September 2026 |
| ECEPH65 T2 RH350BM | 59-gallon heat pump water heater | February 2025 |