Air flow Problems

Balancing and Identifying the Source of Low Airflow

Balanced HVAC airflow is imperative to warming and cooling your home properly; otherwise your heating and air conditioning unit may disperse air unevenly throughout your home. This could result in a stuffy/warm room in the summer or a chilly room during the winter, as well as inflated heating and cooling bills. If you find that your home has uneven temperatures throughout the year, it is most likely because of unbalanced airflow. As for the cause of uneven airflow, there are a variety of things that can affect it, however, they all result in little or no airflow out of your supply air registers. Determining the cause can be extremely easy if you know where to look.


  • Check the supply air and return air registers. If these are blocked or closed, air will not be able to get in or out of the rooms. If there is large furniture placed in front of registers, move them out of the way. Or open registers if you find that they are closed.
  • Check to see if the evaporator coil is dirty or iced up. You may need to cut an access hole into the supply air plenum to see the coil and install a small patch afterward. Low refrigerant can cause your coil to ice up if the air conditioner is on, which will block the airflow. One of our licensed HVAC technicians will have to check the refrigerant if this is the case.
  • Check the HVAC filter on the side of the HVAC unit. This is the number one reason for air flow problems simply because a dirty filter will reduce airflow. To fix a problem like this, one of our technicians will need to replace the filter – a quick and easy service!
  • Check your blower fan for excessive dirt. Running an HVAC unit without a filter can cause the blower fan to get dirty and reduce airflow. If this is the case, one of our HVAC experts will need to clean the blower fan.
  • Examine all your ductwork and see if it is deteriorating or crushed. If ductwork is flexible, it will be extremely vulnerable to damage. Any damaged ductwork will need to be replaced.

If you are experiencing any of these conditions or would like assistance in determining what may be causing airflow problems in your system, please contact your closest office.