Rheem® Water Heaters

100+ Unique Models for Every Application

Approximately 17 percent of the energy used in a home goes toward heating water. Choosing a high-efficiency water heater can cut energy costs by as much as 50 percent and provides added savings and convenience to your customers.1

As one of the world’s most recognized names in water heating solutions, Rheem has been driving industry innovations for decades. With a full line of gas, electric, tank-type, tankless and point-of-use water heaters, Rheem continues to earn top reliability ratings and industry-wide recognition year after year.

The Rheem Advantage

  • Large line of ENERGY STAR® water heaters
  • Industry-best UEF ratings up to 3.70
  • Best FVIR solution, maintenance-free
  • Exclusive leak detection technologies on select models
  • Enhanced-flow brass drain valves
  • Low-lead compliant
  • Variety of Ultra Low NOx products
  • Lifetime warranty on select heaters
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Understanding Rheem Product Lines

Professional Classic Series

The full line of Rheem Professional Classic water heaters, available exclusively through wholesale, includes everything from entry-level models to products with advanced energy-saving features and cutting-edge technologies.

Universal Commercial

Rheem offers a complete line of heavy- and light-duty commercial water heaters for all commercial water heating needs. Rheem products feature the most diverse tank components in the industry, from glass-on-steel to stainless steel to polybutylene.


Rheem Marathon nonmetallic water heaters are made to outlast traditional steel water heaters. They are durable, lightweight and warranted not to leak. Marathon water heaters come with a limited lifetime warranty on the tank and a 6-year warranty on the parts.


Rheem tankless water heaters offer continuous hot water, high-energy efficiency, low operating costs, high-altitude installations, low NOx emissions, precise temperature control and self-diagnostic features all in a compact design.

Get to Know the Differences

Professional Classic Series Water Heaters Universal Commercial Water Heaters Marathon Water Heaters Tankless Water Heaters
  • Easy swap for currently installed heaters
  • Meets all efficiency and safety regulations
Natural gas heavy-duty heater ideal for gyms, laundromats and multi-unit properties Upgrade for currently installed traditional water heaters For previously installed tank units or for new construction
Benefits Lowest initial cost option available in a variety of specs Universal configuration installs into any retrofit application Lifetime warranty Endless hot water and reduced gas consumption
Estimated Useful Life 10-12 years 3-5 years 25+ years 20-25 years