Rheem G82-156 82 Gallon Natural Gas Commercial Water Heater 156000 Max BTU Input

- Item #: BCI2143225

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Universal Heavy Duty Collection Commercial Natural Gas Water Heater with 82 Gallon Tank

The Universal Heavy Duty collection of water heaters is an excellent choice for commercial retrofits. Its compact size and multiple water connections simplify installations. Need installation flexibility? This water heater has water inlets and outlets on top, front, and rear.

Minimize Down Time

The stainless steel burner assembly slides out like a drawer for quick inspection and maintenance. Factory installed brass drain valve features full-port, full flow which allows faster draining and servicing. Multiple magnesium anode rods ensure corrosion resistance for longer tank life.

Save money

The Direct Spark-to-Pilot ignition is designed to save energy and only ignites the pilot when there is a call for heat.

Patented Technology

Patented multi-flue design using a proprietary steel formulation, combined with two coats of porcelain enamel, and the results equal a superior heat exchanger.

System Sentinel

Rheem's exclusive diagnostic system. It watches over the water heater and verifies system operation sequence by sequence via LED lights.


  • Ideal for retrofits
  • Maximum Temperature Setting: 180 degrees F
  • Water Inlets: Top, Front, and Rear
  • Water Outlets: Top, Front, and Rear
  • Stainless Steel Burner
  • Sentinel LED Diagnostic System
  • Multiple magnesium anode rods
  • Direct Spark-to-Pilot ignition System
  • Factory installed full-port, full flow brass drain valve


  • Tank Capacity: 82 Gallons
  • Thermal Efficiency: 80%
  • Performance:
    • Recovery at 60 degree rise: 252 Gallons/Hour
    • Recovery at 70 degree rise: 216 Gallons/Hour
    • Recovery at 80 degree rise: 189 Gallons/Hour
    • Recovery at 90 degree rise: 168 Gallons/Hour
    • Recovery at 100 degree rise: 151 Gallons/Hour
  • Max BTU Input: 156000
  • Warranty: 3 Year Limited Tank
  • Altitude Certification: 5000 ft. above sea level

Rheem has been manufacturing water heaters since the 1930's, with coast to coast distribution by 1936. Their product offerings cover commercial and residential heating, cooling, solar water heating systems, conventional storage-style water heaters, tankless water heaters, replacement parts and accessories. Rheem's manufacturing facilities are ISO 9001 certified, with four facilities in the United States. Choose an industry leader that is respected for reliability. Choose Rheem.

Additional Rheem Links

Our SKU: Rheem G82-156

This product is listed under the following manufacturer number(s):

  • Rheem G82-156

*Denotes a finish or option that has been discontinued

Rheem G82-156 Product Specifications

Specification Sheet
Installation Sheet
ANSI Approved Yes
Altitude Certification 5000
CSA Listed Yes
Capacity (Gallons) 82
Diameter 26.25
Fuel Type Natural Gas
Gas Connection 3/4"
Height to Gas Connection 7
Height to Temperature and Pressure Relief Valve 58.625
Height to Vent 68.8125
Max BTU Input 156000
Maximum Temperature 180
Minimum Clearance Rear 2
Minimum Clearance Side 2
Minimum Clearance Top 12
Minutes to Recover Contents 33
Recovery 168
Required Vent Size 6"
Series Universal Heavy Duty
Shipping Weight 490
Tank Height 64
Thermal Efficiency 80
Voltage 120
Warranty 3 Year Limited Tank
Water Connection 1-1/2"
Water Connection Center to Center 20
Water Pressure (Max) 150

Installation Resource Center

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