Rheem Tankless 5.3 Series
The 5.3 is an excellent hot-water solution for the average 1- and 2-bath home. It will support one shower plus additional household use at the same time.
Rheem tankless water heaters for tankless heating, indoor or outdoor, propane tankless water heaters or natural gas water heaters made by paloma tankless water heaters
Specifications
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80% Efficiency Rating |
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Natural and LP gas |
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Indoor and Outdoor Models |
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3" Diameter Special Gas Vent |
Residential Warranty
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10-Year Limited Warranty on Heat Exchanger |
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3-Year Limited Warranty on Parts |

Rheem Tankless Venting and Owners Manuals
Certification Tax Heater Water Tankless Rheem
Rheem Tankless Indoor RTG-42,RTG-53 and RTG-74 Spec Sheet
Rheem Tankless Outdoor RTG-42,RTG-53 and RTG-74 Spec Sheet
Rheem Tankless GT-199 Spec Sheet
Rheem Tankless 74 Direct Vent Installation Manual
Rheem Tankless 74 Outdoor and Indoor Installation Manual
Rheem Tankless 53 Outdoor and Indoor Installation Manual
Rheem Tankless 53 Direct Vent Installation Manual