Vent filter’s main work is to prevent dirt and allergens from entering the air you breathe. The air in your house comes from the central air system. Vent filter purifies the air further after the air system has removed impurities, making it cleaner.

Are vent filters a good idea?

By placing a good fitting, high quality filter on the return vent, you will remove particles from the air before they can enter the AC system. A good filter will keep your air handling unit, coils, and ducts clean. … We don’t make filters for supply vents. Filters for supply vents are a bad idea.

Do you need air vent filters?

Should you use a filter in your return vent? For most homes, return vents filters are suggested. They typically won’t cause any damage to your HVAC system and are easy to install – there’s no need for an HVAC technician.