If you start to notice less air coming out of your vents than usual, there might be an obstruction in the air ducts.
The most common cause of restricted airflow is a dirty filter.
It’s easy to forget to replace a filter that you installed a few months ago. A good way to remember how long ago it has been since you installed a filter is to write the date you installed it on the filter itself when you first put it in. This can help you keep track of when you should replace it. But make sure it is the right filter. The wrong air filter could also be a cause of low airflow from your HVAC. Due to concern of airborne viruses, more people have begun purchasing higher grade filters. These filters have a tight weave to strain out more tiny particles. This can improve your air quality, however the downside is that more effort is required from your HVAC system to push out air through the filter. Older and lower powered units simply cannot handle those types of filters. Sometimes your ducts are blocked because of a rug or piece of furniture that is placed in front of a vent. If you have a zone control system in your home, a damper could be stuck in its closed position blocking air flow. This can be easily manually fixed yourself. Over the years, ductwork can become damaged or loose and allow air to escape underneath or above your house. Construction debris, insulation fibers, small household objects, or even a rodent could be invading your ductwork restricting air flow. When you need a helping hand figuring out what the cause of your blocked air ducts might be, an HVAC professional could help you clear them out.
Zone controlled HVAC