Rheem Water Heaters 

Rheem G100-200 Review

Rheem G100-200 Universal Gas Commercial Water Heater

Rheem is a gas-powered water heater meant for commercial usage. Rheem G100-200 can hold big amounts of water, which makes it perfect for businesses since they need lots of water. It comes with a diagnostic system that ensures the perfect state of the heater’s mechanism. This model is compact and is cased in stainless steel. Thanks to all these traits you can install the Rheem G100-200 Universal Gas Commercial Water Heaters in any commercial establishment.

It can contain and deliver 100 gallons of water. The maximum power this device offers is 199,000 BTU. That’s incredibly powerful. It has an automatic gas damper that modulates and control the gas that will later warm up the water. This product comes with an awesome 3-year warranty on the whole tank and a 1-year warranty on the parts. It is very dependable and is highly efficient.

Weighing 780Lbs, the Rheem G100-200 can contain 100 gallons of water. It works on natural gas and reaches up to 199,000 BTU. It also comes with a heat and pressure release valve, a full port valve, and a brass flow drain valve. It includes a 3-year warranty on the tank and a one-year warranty on all parts. This model is for commercial use and its steel is a patented formula. It is compact and can fit any establishment.


  • Wide business uses.
  • Universal unit.
  • Compact and efficient.


  • Not for household use.
  • Though compact, is still too big to install in reduced spaces.

FAQ on the Rheem G100-200

Q: Can I turn it into LPG with a conversion kit?

A: No, you can’t. You have to buy a model compatible with LPG.

Q: How do I fix a leakage?

A: If there is any leakage, you need to replace the damaged part.

General view

Universal is a series of water heaters for business use produced to fit in narrow reconditioned places.

Features and Advantages

The narrow the place left for the water heater, the more you will love the compact design and various connections the Universal has for a more accommodable installation. Chosen among 80% thermal efficiency devices with a rate from 98,000 to 400,000 BTU an hour, and with an upper limit of 180°F.

Compact Design

The small dimensions of height and jacket diameter, along with the upper, frontal and back water connections allow the utmost comfortable installation.

System Sentinel

This is a unique diagnosis system that monitors the system process step by step and indicates any issue with shining LED lamps.

Patented Formula

Universal’s patented steel formula and several flue mechanism, along with two layers of china enamel, offer a higher heat exchanger engineering.

Stainless Steel Burners

Accurate burning system and lifted port layout are made of high chromium stainless steel. Each burner line can be drawn out for cleaning and checking.

Low Profile Damper

This low-profile design reduces the entire heater’s height. Strong wind hood supports are made to resist mistreatments during installation.

Full Port and Flow Drain Valve

Built-in brass drain valve makes it drain and deliver faster.

Direct Spark-to-Pilot Ignition

Consumption efficiency system that turns on the pilot just when it gets a heat demand.

Height Accreditations

5,000 Ft for natural gas and 2,000 Ft for LP. Having a high-altitude accreditation kit, up to 8,000 Ft.

Anode Rods

Anode layout uses several magnesium rods to avoid rust and give the tank a longer lifespan.

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