Professional Classic Series: Atmospheric
MODEL PROG40-36N RH62
- Tank - 6 Years limited
- Parts - 6 Years limited
- With ProtectionPlus™ the 6-year limited tank warranty becomes 10 years!
- .58 - .66 UEF
- Eco-friendly burner, low NOx design
- 29, 30, 40 and 50 gallon capacities
- Select models have side water connections for space heating applications
Select Capacity
29
Gallons
30
Gallons
40
Gallons
50
Gallons
SKU PROG40-36N RH62
Warranty Years 6
Model Professional Classic Atmospheric
Tank Capacity 40
Fuel Natural Gas
Height 59.75"
Width 19"
Single Shower Minutes 18
Number Back To Back Showers 2
Professional Classic® Atmospheric gas water heaters are engineered for more hot water at a low operating cost
Efficiency- .58 - .66 UEF
- More hot water at a low operating cost
- FHR: 51 - 87 gallons
- Recovery: 30.3 to 40.4 GPH at a 90° F rise, depending on model
- Exclusive air/fuel shut-off device
- Maintenance free – no filter to clean
- Protective control system that disables the heater in the presence of flammable vapor accumulation
- Eco-friendly burner, low NOx design
- Meets 40 ng/J NOx requirements
- Premium grade anode rod provides long-lasting tank protection
- All models certified up to 5,999 feet above sea level, some certified up to 10,000 feet. Consult factory for specifications
Plus…
- Easy to light – no matches required
- EverKleen™ patented system fights sediment build-up
- Exclusive Rheemglas tank lining resists corrosion and prolongs tank life
- Enhanced flow brass drain valve
- Factory installed temperature and pressure relief valve on select models
- Low lead compliant
- Standard replacement parts
- Tank - 6 Years limited
- Parts - 6 Years limited
- With ProtectionPlus™ the 6-year limited tank warranty becomes 10 years!








More Residential Rheem Products
Find additional documentation by viewing these related products.
Natural Gas
Professional Classic Plus Series: Induced DraftCapacity 29-29
- .71 UEF
- Fan assisted design
- 90 Gallon FHR Performance
- 60,000 BTU
- Available in 29 gallon gas model
Natural Gas
Propane Gas
Professional Classic Plus Series: Heavy Duty Power Direct VentCapacity 65-75
- .63 UEF
- Flammable vapor detection system
- 75 gallon capacities
- Two pipe system: one pipe pulls in outside air for combustion and the other exhausts combustion gases
Propane Gas
Natural Gas
Professional Classic Plus Series: Heavy Duty Power VentCapacity 75-75
- Standard 110 VAC electrical connection
- New whisper quiet blower
- 75 gallon tall and short capacities
Natural Gas
Propane Gas
Professional Classic Series: Heavy DutyCapacity 60-75
Professional Classic™ Heavy Duty gas
(Not Available in US)
- The perfect match for high volume hot water applications
- Higher BTU inputs for faster recovery and more hot water
- 60 and 75 gallon


