Economizer Basics, Reduce HVAC Energy Costs
Learn more about how an economizer can save energy and extend the life of commercial HVAC systems. Learn how they work, and why summer is the perfect time to maintain them.
What Is an HVAC Economizer?
An economizer is a key energy-saving feature found in many commercial HVAC systems, especially rooftop units (RTUs) and large air handlers. It works by using cool outdoor air to help cool your building—reducing the need for mechanical air conditioning and lowering utility bills.
Instead of always relying on the compressor to cool the air, an economizer brings in fresh outside air when conditions are right. This process, often called “free cooling,” is a cost-effective way to regulate indoor temperatures while improving air quality.
How Do Economizers Work?
Economizers use a system of dampers, sensors, and controls to monitor both indoor and outdoor air conditions—specifically temperature and humidity. When the outdoor air is cooler than the air inside your building, the economizer opens the dampers and pulls in that air to cool the space naturally.
Example:
On a 68°F morning with low humidity, if your indoor temperature is 75°F, your HVAC system can use the cooler outside air to reduce the load on the air conditioning system.
This not only saves energy but also decreases wear and tear on the compressor and other mechanical parts.
Why Economizers Are Especially Useful in Summer
While it may seem like economizers are more useful during spring or fall, they can actually be highly effective during summer—particularly in the early mornings, evenings, or milder weather days.
Here’s why:
✅ Reduced Energy Usage: Economizers can significantly cut down on how often your AC system runs.
✅ Extended Equipment Life: Less strain on the system means fewer repairs and a longer lifespan.
✅ Improved Indoor Air Quality: Brings in more fresh, filtered outdoor air.
✅ Code Compliance: Helps meet modern ventilation standards like ASHRAE 62.1.
For buildings with high internal heat loads—like office buildings, schools, or retail centers—economizers are a smart choice to manage cooling efficiently.
Common Economizer Issues to Watch For
Like any mechanical component, economizers need regular maintenance. A malfunctioning economizer can actually waste energy or introduce unconditioned air into your building.
Common problems include:
- Stuck or broken dampers
- Faulty temperature or humidity sensors
- Incorrect control settings
- Poor calibration or lack of inspection
Scheduling routine HVAC maintenance with Level One HVAC ensures your economizer is working as it should—especially before the peak summer heat hits.
Is an Economizer Right for Your Building?
Economizers are best suited for:
- Buildings in cooler or mixed climates
- Facilities with large cooling loads (retail, office, schools, etc.)
- Businesses looking to improve energy efficiency or pursue LEED certification
If you’re unsure whether your system includes a functional economizer or if it’s operating at its best, our team at Level One HVAC Services, Inc. can perform a system inspection and tune-up.
Optimize Your System with Economizer Maintenance
At Level One HVAC, we specialize in optimizing commercial HVAC systems for peak performance and efficiency. If your building relies on rooftop units or packaged systems, a properly functioning economizer can make a big impact on your summer energy bills.
Contact us today to schedule an inspection or summer maintenance visit—and make sure your system is ready to perform efficiently all season long.
Toll Free 844-616-4822
Headquarters 248-486-6500
Grand Rapids 616-616-4822
West Branch 989-999-4822
