Most people do not notice good air quality – but they do notice when it’s bad. Musty rooms, stuffy air, uncomfortable humidity, odors – these are signs that your building isn’t getting the right amount of fresh outdoor air.
GreenTrol’s airflow measurement devices reduce sick days and enhance productivity by ensuring the right balance of fresh outdoor air and optimal indoor air quality (IAQ). GreenTrol Improves IAQ:
With labor costs making up 60% of business expenses, optimizing IAQ is a cost-effective way to protect your workforce and boost efficiency.
GreenTrol’s Outdoor Air Flow Controllers use precision thermal dispersion sensors and integrated controls to maintain ideal fresh air intake—keeping employees healthier and businesses running smoothly.
The primary purpose of a building’s HVAC system is to provide thermal comfort for occupants. However, many light commercial systems fail to supply the right amount of outdoor air, compromising both IAQ and comfort. GreenTrol offers an affordable, effective solution. Our precision thermal dispersion airflow sensors and integrated controls ensure optimal outdoor air intake, improving indoor air quality, occupant health, and energy efficiency.
GreenTrol’s Outdoor Air Controllers help maintain healthier indoor environments by delivering the right amount of outdoor air. Our precision airflow sensors and integrated controls support occupant well-being while keeping your system efficient.

CO2, Relative Humidity, and Temperature

Airflow, Temperature

Thermal Imaging

Airflow, Temperature and Humidity

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

Probes and Controllers