African american hvac technician is checking an air conditioning unit, performing maintenance on the ventilation system in a modern office building


Temperatures are rising, a precursor to surging pollen levels. As the weather begins to shift, airborne allergen agents circulate, making indoor air quality (IAQ) a priority for facilities. Climate change has contributed to increased pollen and mold activity nationwide, leading to significant allergy symptoms persisting for longer durations of time.

To maintain the health and safety of indoor environments amid a prolonged allergy season, commercial cleaning executives can consider the following measures to safeguard building occupants.

1) Dusting Ductwork 
Before transitioning to spring, facilities should evaluate ductwork connected to HVAC systems. The winter months likely saw increased run time on heating systems, allowing dust and airborne particles to accumulate in ventilation ducts. By cleaning dust and debris, frontline teams can remove harmful contaminants and enhance overall airflow by up to 46 percent.

2) Changing Air Filters 
Assessing filters across all HVAC systems can reduce the risk of respiratory illnesses. Dirty filters can diminish air flow and circulation, thereby allowing dirty air into the indoor environment. More importantly, having the correct filter material can improve protection against outdoor pollutants, such as wildfire smoke. Increasing filter change frequency can also improve IAQ, as clean air filters enhance system efficiency, resulting in long-term operational savings.

3) Evaluating IAQ Sensors 
Implementing IAQ sensors supports facility managers by accurately assessing air quality and alerting frontline teams to immediate issues—including airborne exposures. This process provides real-time data, which leaders can use to address IAQ needs specific to each building type.