Water Heater Manuals & Owner Guides — page 18

1,255 models · 74 brands · Data updated October 7, 2026

All water heaters A–Z

Water Heaters
ModelBrandDescriptionCertified
ECOHS160IP Rheem 157,000 Btu/h propane tankless water heater April 2024
ECOHS180IN Rheem 180,000 Btu/h natural gas tankless water heater April 2024
ECOHS180IP Rheem 180,000 Btu/h propane tankless water heater April 2024
ECOHS200IN Rheem 199,000 Btu/h natural gas tankless water heater April 2024
ECOHS200IP Rheem 199,000 Btu/h propane tankless water heater April 2024
ECOHSR160IN Rheem 157,000 Btu/h natural gas tankless water heater April 2024
ECOHSR160IP Rheem 157,000 Btu/h propane tankless water heater April 2024
ECOHSR180IN Rheem 180,000 Btu/h natural gas tankless water heater April 2024
ECOHSR180IP Rheem 180,000 Btu/h propane tankless water heater April 2024
ECOHSR200IN Rheem 199,000 Btu/h natural gas tankless water heater April 2024
ECOHSR200IP Rheem 199,000 Btu/h propane tankless water heater April 2024
PRO H40 T2 RH310BM Rheem 36-gallon heat pump water heater November 2024
PRO H40 T2 RH310UM Rheem 36-gallon heat pump water heater November 2024
PRO H50 T2 RH310BM Rheem 45-gallon heat pump water heater November 2024
PRO H50 T2 RH310UM Rheem 45-gallon heat pump water heater November 2024
PRO H65 T2 RH310BM Rheem 59-gallon heat pump water heater November 2024
PRO H65 T2 RH310UM Rheem 59-gallon heat pump water heater November 2024
PRO H80 T2 RH310BM Rheem 72-gallon heat pump water heater November 2024
PRO H80 T2 RH310UM Rheem 72-gallon heat pump water heater November 2024
PRO+G40-50P RH HE EC1 Rheem 40-gallon propane storage water heater November 2024
PRO+G40-50U RH HE EC1 Rheem 40-gallon natural gas storage water heater November 2024
PRO+G50-50P RH HE EC1 Rheem 50-gallon propane storage water heater November 2024
PRO+G50-50U RH HE EC1 Rheem 50-gallon natural gas storage water heater November 2024
PROP G40-50* CN HE Rheem 40-gallon gas storage water heater November 2024
PROP G40-50* RH HE EC3 Rheem 40-gallon gas storage water heater November 2024
PROP G50-100* CN HE EC3 Rheem 50-gallon residential-duty commercial gas water heater November 2024
PROP G50-100* RH HE EC3 Rheem 50-gallon residential-duty commercial gas water heater November 2024
PROP G50-50* CN HE Rheem 50-gallon gas storage water heater November 2024
PROP G50-50* RH HE EC3 Rheem 50-gallon gas storage water heater November 2024
PROP G50-76P CN HE Rheem 50-gallon residential-duty commercial propane water heater November 2024
PROP G50-76U CN HE Rheem 50-gallon residential-duty commercial natural gas water heater November 2024
PROP G50-76* CN HE EC3 Rheem 50-gallon residential-duty commercial gas water heater November 2024
PROP G50-76* RH HE EC3 Rheem 50-gallon residential-duty commercial gas water heater November 2024
PROPG75-100P RH HE EC3 Rheem 75-gallon residential-duty commercial propane water heater May 2025
PROPG75-100U RH HE EC3 Rheem 75-gallon residential-duty commercial natural gas water heater May 2025
PROPH40 T0 RH120-M Rheem 36-gallon 120-volt heat pump water heater November 2024
PROPH40 T0 RH120-MSO Rheem 36-gallon 120-volt heat pump water heater November 2024
PROPH50 T0 RH120 Rheem 46-gallon 120-volt heat pump water heater November 2024
PROPH50 T0 RH120-M Rheem 46-gallon 120-volt heat pump water heater November 2024
PROPH50 T0 RH120-MSO Rheem 46-gallon 120-volt heat pump water heater November 2024
PROPH50 T2 RH400-30 Rheem 45-gallon heat pump water heater August 2026
PROPH50 T2 RH400-SO Rheem 45-gallon heat pump water heater August 2026
PROPH50 T2 RH400-Z30 Rheem 45-gallon heat pump water heater August 2026
PROPH65 T0 RH120-M Rheem 59-gallon 120-volt heat pump water heater June 2026
PROPH65 T0 RH120-MSO Rheem 59-gallon 120-volt heat pump water heater June 2026
PROPH80 T0 RH120-M Rheem 72-gallon 120-volt heat pump water heater November 2024
PROPH80 T0 RH120-MSO Rheem 72-gallon 120-volt heat pump water heater November 2024
PROPH80 T2 RH400-30 Rheem 72-gallon heat pump water heater August 2026