Rheem Air Conditioner RA18AZ

Rheem RA18AZ Endeavor™ Line Prestige® Series iM Air Conditioners


Rheem® Endeavor™ Line Prestige® Series

The EcoNet® Enabled Rheem Endeavor Line Prestige Series RA18AZ is ENERGY STAR® certified, offering one of the highest efficiencies available today. So your utility bills go down, while your home stays consistently comfortable.

Loaded with Cool

Innovation You Can Count On

Patented industry-first features and 360+1 design make the Rheem Endeavor RA18AZ a smart choice.

Peace-Of-Mind Performance

Peace-Of-Mind Performance

Relax, you’re covered by one of the best warranties in the industry. 10 Year Parts + 10 Year Conditional Unit Replacement.

Energy Savings

Energy Savings

Just like a vehicle’s MPG, the higher the SEER2 and EER2 rating (Seasonal Energy Efficiency Ratio / Energy Efficiency Ratio), the higher the efficiency of your air conditioner—allowing for energy savings month after month. Keep in mind, other factors such as system matching, sizing, ductwork and installation also affect overall efficiency.

Superior Comfort

Superior Comfort

Inverter driven, variable speed compressor technology features cooling operation between 40% and 100% of capacity (with overdrive capability up to 115% in extreme conditions) to continuously meet your ever-changing cooling needs. You’ll enjoy exact temperature and advanced humidity control that combine to exceed your optimal comfort expectations.

Durable Curb Appeal

Durable Curb Appeal

Curved louvered panels and rugged corner posts provide excellent protection to internal components, while modern cabinet aesthetics including the corrosion-resistant composite base pan and powder coat paint system allow your unit to put its best face forward for years to come.

Quiet Operation

Quiet Operation

Efficient home comfort shouldn’t be noisy. That’s why our air conditioners are designed with acoustics in mind. Integrated sound-dampening features such as refrigerant tubing design, fan blade approach, composite base pan and innovative compressor and drive technologies let you enjoy more efficiency—and less noise.

Sound Rating Chart
360 Logo

We Thought of Everything… & Then Some

We evaluate every detail of a product from top to bottom, inside and out and every angle in between. That’s 360+1. And that’s why you can count on this air conditioner to bring you and your family years of efficient and dependable comfort.



From the smallest part to complete comfort systems, we build quality into everything we make so we can be sure it’s tough enough to deliver the ultimate performance you can count on day after day, year after year. That reliability is what makes Rheem different—and better.

Rheem RA18AZ Prestige® Series Air Conditioners
Sustainability Standout

Helping You Live Both Comfortably and Sustainably

Many Rheem products have sustainability features, but the RA18AZ has earned our Sustainability Standout Seal, indicating it’s among the best of the best. We created the Seal to help you more easily find the products that save energy, save money and save the planet.

Energy Star

Among Air Conditioners, This One’s a Star

Earning ENERGY STAR® recognition means products meet strict energy efficiency guidelines set by the U.S. Environmental Protection Agency. ENERGY STAR certified heating and cooling equipment can enhance the comfort of your home while saving energy—which saves money on utility bills and protects our climate by reducing harmful carbon pollution and other greenhouse gases.

EcoNet WiFi
EcoNet Mobile App Controls EcoNet Thermostat. Apple, Android, alexa

The Rheem Endeavor RA18AZ operates with the easy-to-use EcoNet Smart Thermostat, which optimizes system performance and provides a new level of protection and precision comfort with features like:

  • Communication with latest sensor technology
  • Control of your thermostat from anywhere via the EcoNet App3
  • Alerts sent directly to your phone or email
Rheem Air Conditioner RA18AZ
Simplified Install & Service with Bluetooth Technology

Built-in Bluetooth connectivity makes it faster and easier for your contractor to install and service your new system. This can help lower your costs and help make your home comfortable again-fast.


Cooling Efficiency: 19 SEER2 / 12 EER2
Nominal Sizes: 2 to 5 Tons
Cooling Capacities: 22.8 to 54 kBTU
EcoNet® Enabled: Yes
Sound Rating: As low as 54 dB
Compressor Type: Inverter Driven, Variable Speed
Condenser Coil Type: 3/8 in.


  • PlusOne® Diagnostics - Bluetooth technology aids in quick & easy service
  • PlusOne Expanded Valve Space - Provides a minimum working area of 27-square in.
  • PlusOne Triple Service Access - 15 in. wide industry leading corner service access, two-fastener removable corner and easily removable individual louver panels

Limited Warranty:

  • Parts - 10 Years
  • Unit Replacement - 10 Years (registration required)
Rheem Logo

Nearly 100 Years of Innovation

As the only brand bringing innovative air and water solutions to homes and businesses around the world, Rheem continues to deliver advanced comfort, savings and experiences to our customers-just as we’ve done for nearly 100 years.