Rheem G100-250A

100 Gallon Natural Gas Commercial Water Heater 250000 Max BTU Input ASME Construction

Item # BCI2143214   |   Model # G100-250A   |  Universal Heavy Duty Collection

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Universal Heavy Duty Collection 250000 Max BTU Input Commercial Natural Gas Water Heater with 100 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.

ASME Construction

This water heater is constructed in accordance with the requirements of the ASME Boiler and Pressure Vessel Code, Section IV Part HLW.


  • 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
  • ASME Construction


  • Tank Capacity: 100 Gallons
  • Thermal Efficiency: 80%
  • Performance:
    • Recovery at 60 degree rise: 404 Gallons/Hour
    • Recovery at 70 degree rise: 346 Gallons/Hour
    • Recovery at 80 degree rise: 303 Gallons/Hour
    • Recovery at 90 degree rise: 269 Gallons/Hour
    • Recovery at 100 degree rise: 242 Gallons/Hour
  • Max BTU Input: 250000
  • 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

This Rheem item can also be referenced by the following color/finish specific model #:

  • Rheem G100-250A

*Discontinued model or finish

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Installation Resource Center

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