Rheem G100-80 100 Gallon Natural Gas Commercial Water Heater 80000 Max BTU Input

- Item #: BCI2143216
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Universal Medium Duty Collection Commercial Natural Gas Water Heater with 100 Gallon Tank 80000 Max BTU Input

The Universal Medium Duty collection of water heaters is an excellent choice for commercial retrofits. Specifically designed to fill the needs for small restaurants, offices, apartments, and more. Its compact size simplifies installations.

Minimize Down Time

Factory installed brass drain valve features full-port, full flow which allows faster draining and servicing. Magnesium anode rod ensures corrosion resistance for longer tank life.

Automatic Controls

If the pilot flame is extinguished the automatic control system is designed to shut off the gas. Relighting is a safe, easy procedure. Built-in gas pressure regulator assures even gas flow. Thermostat settings to 160 degrees F.


  • Ideal for Retrofits, Small Restaurants, Offices, Apartments, and More
  • Maximum Temperature Setting: 160 Degrees F
  • Water Inlets: Top, Front, and Rear
  • Water Outlets: Top, Front, and Rear
  • Stainless Steel Burner
  • Multiple Magnesium Anode Rods
  • Factory Installed Full-Port, Full Flow Brass Drain Valve


  • Tank Capacity: 100 Gallons
  • Thermal Efficiency: 80%
  • Performance:
    • Recovery at 60 degree rise: 129 Gallons/Hour
    • Recovery at 70 degree rise: 111 Gallons/Hour
    • Recovery at 80 degree rise: 97 Gallons/Hour
    • Recovery at 90 degree rise: 86 Gallons/Hour
    • Recovery at 100 degree rise: 78 Gallons/Hour
  • Max BTU Input: 80000
  • Warranty: 3 Year Limited Tank

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 G100-80

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

*Denotes a finish or option that has been discontinued

Rheem G100-80 Product Specifications

Specification Sheet
Installation Sheet
ANSI Approved Yes
CSA Listed Yes
Capacity (Gallons) 100
Diameter 28.25
Fuel Type Natural Gas
Gas Connection 1/2"
Height to Gas Connection 11
Height to Temperature and Pressure Relief Valve 57.8125
Height to Vent 69.625
Max BTU Input 80000
Maximum Temperature 160
Minimum Clearance Front Alcove
Minimum Clearance Side 1
Minimum Clearance Top 12
Minutes to Recover Contents 77
Recovery 86
Required Vent Size 4"
Series Universal Medium Duty
Shipping Weight 540
Tank Height 65.75
Thermal Efficiency 80
Voltage 120
Warranty 3 Year Limited Tank
Water Connection 1"
Water Connection Center to Center 15
Water Pressure (Max) 150

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

Rheem G100-80 Reviews

  • Does this heater come with a conversion kit to LP gas?


    The Rheem G100-80 can not be converted to natural gas.

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