How should I clean my HVAC intake vents?

What Cleaning Depends On

The right way to clean your intake vents—also called return air vents—depends on two things: whether you're cleaning the metal or plastic grille on the surface, or the ductwork that lies behind it. A simple surface cleaning is a quick task, while cleaning the ducts is a more involved job.

Why Bother Cleaning Intake Vents?

Your HVAC system is like a pair of lungs for your home, and the intake vents are where it breathes in. When they get clogged with dust, pet hair, and other debris, the system has to work harder, which can increase your energy bills and strain the equipment. Keeping them clean helps your system run efficiently and improves your home's air quality.

How to Clean the Vent Cover

Cleaning the grille itself is a great habit to get into. For safety, it’s always a good idea to turn your HVAC system off at the thermostat before you begin.

• For a light dusting, use the brush attachment on your vacuum cleaner to go over the surface of the vent.
• For a deeper clean, unscrew the vent cover from the wall or ceiling.
• Wash it in a sink or bathtub with warm water and a mild dish soap. An old toothbrush can help scrub the slats.
• Rinse the cover thoroughly and let it dry completely before you screw it back in place to prevent rust or mold.

What About the Ductwork Behind It?

After removing the vent cover, you'll likely see some dust buildup inside the duct opening. You can use your vacuum's hose attachment to clean as far as you can comfortably reach. This is good routine maintenance, but it’s not the same as a professional duct cleaning, which uses specialized equipment to clean the entire length of your duct system.

When to Call a Pro

While surface cleaning is a DIY job, a full duct cleaning is best left to a certified HVAC professional. You should consider calling one if:

• You see or smell mold around your vents or coming from the ducts.
• There is excessive dust and debris that comes back immediately after cleaning.
• Your home has recently undergone major renovations, which can kick up a lot of drywall dust and other debris.
• Someone in your home has allergies or asthma and you want to ensure the highest possible air quality.