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Commercial Rooftop AC Unit


Traditional air conditioning units take up landscaping space and aren’t attractive. To maintain curb appeal while keeping a building comfortable, many Portland-area professionals opt for commercial rooftop systems, which also have heating capabilities. The systems offered by the Portland HVAC experts at AAA Heating and Cooling are pre-engineered, cost-effective, and adaptable for a variety of applications.


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Commercial Rooftop AC Service You Can Count On

We have been providing quality service to clients in the Portland and Beaverton areas for over 60 years! For quality rooftop system installation by professional installers, look to the AAA Heating & Cooling experts. 

Our highly-trained, NATE-certified technicians are masters of their craft and are continually evaluated for HVAC installation proficiency and maintenance knowledge and skills.

Commercial Rooftop HVAC Options

AAA Heating & Cooling’s HVAC professionals can configure a rooftop unit as an air conditioner or a heat pump that heats and cools. 

We can install a humidistat on the unit to allow the user to control ventilation and humidity levels, and several additional accessories are available for our rooftop units.

How Commercial Rooftop HVAC Systems Work

Commercial rooftop HVAC, or package, systems are different from the typical split systems found in homes. While a split system has a cabinet indoors and one outdoors with different components, rooftop units have all the components in the same cabinet on the roof.

Rooftop units typically have a compressor toward the back of a cabinet with the condenser coils wrapped around it or nearby. Refrigerant arrives at the compressor, flows into the condenser coils, and gives off heat. The metal fins on the coil serve as a heat sync while the condenser fan blows exhaust away from the building.

As warm air travels through a building’s ductwork to the rooftop unit, fresh air also enters. Cooled refrigerant passes through the evaporator coil. As warm air passes over the evaporator coil, the refrigerant extracts the heat, cooling the air. A fan blows the cool air back into the building via ducts. The cycle continues until the building reaches the desired temperature.

Advantages of rooftop units include:

  • Units stay cleaner
  • Units are less likely to be damaged by individuals
  • Less noise
  • One system for heating and cooling
  • Ease of installation

Disadvantages of the systems include:

  • Systems aren’t as simple to access, inspect, or maintain
  • Vulnerability to storm damage
  • It might be simple to forget to do routine maintenance tasks because they’re out of sight
  • Systems require adequate structural support and sufficient roof space


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Commercial Rooftop System Repair & Maintenance

AAA Heating & Cooling gladly repairs, services, and installs rooftop units. Our NATE-certified technicians are skilled at locating your issues and performing maintenance on your commercial rooftop system. Below are a few of the most common issues we find.


Improperly-Calibrated or Bad Sensors

Rooftop systems can have a variety of sensors that measure details like:

  • CO2
  • Occupancy
  • Humidity
  • Pressure
  • Temperatures

When they don’t work correctly, performance is compromised and efficiency may decrease by up to 40 percent.

Incorrect Refrigerant Levels

Refrigerant makes heat transfers possible. When levels are too high or low, it can:

  • Compromise a unit’s performance
  • Create uncomfortable indoor temperatures
  • Cause abnormal system pressures
  • Increase power bills by up to 11 percent.

Airflow problems

When air doesn’t flow through a rooftop unit correctly, you may notice poor airflow at the vents. Certain rooms may also seem warmer or more humid, and energy bills may increase by up to 11 percent.

Our Commercial Rooftop Unit Promise

AAA Heating & Cooling offers a selection of reliable commercial rooftop systems designed to save energy and reduce your cost of ownership. For peace of mind, many of the components in these systems are backed by warranties. 

Whether you need your system repaired or seek a new heating and cooling solution for your commercial building, our HVAC experts are ready to be of service. For more information about commercial rooftop AC units for your Portland or Beaverton area business, contact us today!


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