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OPERATION & MAINTENANCE

Make Your HVAC System Work Smarter, Not Harder

The number one function of an HVAC system is to provide thermal comfort for occupants in a given space. The system design also has to adhere to building codes. One of those codes is to deliver the proper amount of Outdoor Air. If you have an HVAC system without an accurate OA sensor, how do you know how much OA is coming into the space?

 

Think of it like driving a car without a speedometer. Sure, the car runs—but you have no idea how fast you’re going. The same applies to your

Measure Outside Air

It is important to dilute Outside Air

Measure Exhaust

When Exhaust is on make up air must be supplied .

GreenTrol Helps You Take Control

The operation of the HVAC system is an integral part of any building design. The system needs to work properly and efficiently. All commercial buildings require a certain amount of Outdoor Air. Many products go into making the HVAC system operable and efficient. The best way to properly bring in the correct amount of air is to install an accurate OA sensor and integrated controls. When that is correctly done, the HVAC system works properly and more efficiently.

 

GreenTrol’s thermal dispersion airflow sensors and integrated controls make it easy to monitor, validate, and maintain optimal airflow across your facility. Our solutions are built for long-term performance—helping your system run more efficiently, extending equipment life, and reducing the need for manual recalibration.

Why Facilities Teams Trust GreenTrol:

  • Accurate, Reliable Airflow Measurement
    Measure outdoor, exhaust, and return air with confidence. Built-in alarms alert you to fan failure, damper issues, actuator slippage, or filter loading—so you can act fast before a small issue becomes a costly one.
  • No Frequent Recalibration Required
    Our sensors are factory-calibrated, highly stable, and require minimal maintenance—saving you time and labor.
  • Demand Control Ventilation, Made Simple
    Seamlessly integrates with CO₂ sensors and occupancy counters for real-time airflow adjustments based on actual building usage.
  • Streamlined Operations
    Centralized control and monitoring across multiple zones means you can spend less time troubleshooting and more time optimizing performance.
HVAC Verification

Long-Term Value, Even Beyond the Unit

When it’s time to replace your rooftop or packaged unit, don’t toss the GreenTrol controller—transfer it to your new system. Our sensors keep working long after your HVAC unit reaches end-of-life.

Smart HVAC Starts with Smart Airflow

GreenTrol helps your system do what it was designed to do—deliver comfort, meet ventilation codes, and operate efficiently. Let your team focus on what matters, with confidence your HVAC system is running at its best.

Wall Mount

CO2, Relative Humidity, Temperature

Small Ducts & Rooftop Units

Airflow, Temperature and CO2

occupancy counter

Occupancy Counter

Thermal Imaging

Small Ducts & Rooftop Unit Controls

Airflow, Temperature and CO2

Alarms

Display, Alarm and Analog to RS-485 BACnet/Modbus Bridge

Replacement Products

Probes and Controllers