How Often Should an HVAC Filter be Changed?

Need More Help? Use the Form Below or Call 1-888-559-6352

The email address and phone number are good ways to reach me.

How Often Should a Commercial HVAC Filter Be Changed?

The purpose of your HVAC’s air filters is to prevent dust, bacteria, mold spores and other debris from contaminating the air being distributed throughout your establishment. Over time, however, these filters can become clogged and require replacing. So, how often should commercial HVAC filters be changed?


Changing the air filters in your HVAC system is one of the most important maintenance tasks to ensure optimal performance and extend the lifespan of your equipment. While air filters are changed during regular commercial HVAC maintenance checks, this shouldn’t be the only time throughout the year that your air filters are replaced.

How Often Should Commercial HVAC Filters Be Changed?

The frequency of commercial air filter replacement depends on a few variables, including the type of HVAC system you have, the size of the units, as well as the location of your building. All of these factors can impact how often your commercial HVAC filters need to be replaced. 


In controlled indoor environments like offices, you can expect to change your filter at least three to four times a year. Commercial HVAC units operating in more difficult and unpredictable environments—such as medical or military buildings—will require more frequent air filter replacement.

Many commercial HVAC units have maintenance sensors, some of which help you understand when a filter change is required. If your unit’s maintenance sensors are indicating that the temperature, pressure and air flow are all outside optimal parameters, that’s a good sign to change the air filter. 


Regardless of how much or little time has passed since the last filter change, however, it’s imperative that you change a filter out if it is ever clogged with dust or debris. Dirty air filters restrict airflow, forcing your unit to work harder to operate which can lead to premature burnout.

How to Determine Your HVAC Unit’s Filter Change Schedule

If you’re ever unsure how or when to change your commercial HVAC filters, simply consult a professional about your building’s specific HVAC system. Your technician should be able to provide you with an analysis of your HVAC unit’s needs, including the recommended filter replacement schedule.


Take the guesswork out of commercial HVAC maintenance and always be sure your unit is operating at its best by trusting the professionals. Reliable HVAC technicians always conduct a filter change during regularly scheduled maintenance checks, so if you get your HVAC unit tuned up in the spring and the fall, you’ll have far less to worry about as far as dirty filters go. 

Need Professional Commercial HVAC Maintenance?

Contact CroppMetcalfe for expert commercial HVAC maintenance services. Our 5-Star Technicians provide 24-hour emergency service with prompt response and superior quality work. Commercial HVAC maintenance includes air conditioning, heating, refrigeration and ventilation installations, as well as first-class repair and retrofit solutions.