How to Clean HVAC Ducts

Your HVAC system provides quality cooling and heating within your building. Even if you buy the most high-end model in the market, it will be useless if the air ducts are always filthy. That’s the perfect time to learn how to clean out HVAC ducts to ensure the air that passes through exits out of the vents is clean and fresh.

Before learning how to clean them, you need to learn about the three main types of ductwork systems. These include:

• Flexible Ductwork. Typically made from a thin layer of plastic and reinforced with wire, flexible ductwork is used in tight spaces due to its versatility. Cleaning this duct type often includes removing debris and dust that accumulate inside the ducts, which can hinder airflow.
• Sheet Metal Ductwork. Common in commercial buildings, this type of ductwork is sturdy and easily accessible for cleaning. The smooth surfaces of sheet metal allow for efficient cleaning procedures, removing pollutants that can build up over time.
• Fiberglass Ductwork. This system has insulation integrated into its structure, which absorbs dust and contaminants. Cleaning fiberglass ducts requires careful handling to avoid damaging the insulation and releasing trapped particles into the air.

How to Clean Your HVAC Ducts

1. Necessary Tools and Equipment

While you’re learning how to clean HVAC ducts yourself, you’ll need to start by gathering air duct cleaning tools and equipment for the cleaning task:

• Screwdriver
• Power drill
• Brush or stiff-bristle brush
• Vacuum cleaner (preferably with a hose attachment)
• Furnace filter
• Paper towels or microfiber cleaning cloths
• Mask and gloves
• Bucket of warm, soapy water
• Flashlight
• Protective eyewear

2. Turn Off Your HVAC System

Turn off your HVAC system at the thermostat and disconnect the power by turning off the breaker or unplugging the unit.

3. Gather Materials and Safety Gear

Wear protective gear, such as a mask, gloves, and goggles, to protect yourself from dust and debris. Make sure your tools and materials are within reach.

4. Access the Air Ducts

Locate and remove vent covers/grilles. Using a power drill or screwdriver, unscrew the grilles and place the screws in a safe spot to avoid losing them.

5. Preliminary Cleaning

Using a vacuum cleaner with a hose attachment, vacuum around the vent openings. This will remove loose debris on the dirty ducts.

6. Cleaning Inside the Ducts

• Manual Cleaning. With a brush or stiff-bristle brush, loosen dust and debris inside the dirty air ducts. Be gentle to avoid damaging the ductwork. Then, attach the hose attachment to your vacuum cleaner and thoroughly vacuum the interior of the air ducts. Use the flashlight to examine and ensure you haven’t missed any areas.
• Deep Cleaning. You might need specialized tools like rotary brushes connected to a drill for more thorough cleaning. Insert the brush into the dirty air duct and move it back and forth to dislodge and collect more embedded dirt.

7. Wash the Blower Compartment and Return the Air Boot

These are critical areas that can accumulate a lot of dirt and dust. Open the access panels (usually located near the furnace or air handler). Clean the blower compartment and reinstall the air boot thoroughly with the vacuum and brush.

8. Clean the Vent Covers/Grilles

Submerge vent covers in warm, soapy water for approximately 10 minutes. Scrub with a brush to remove stuck-on grime. Rinse and allow them to dry completely before reinstalling.

9. Replace the Furnace Filter

A clean HVAC system requires a clean filter. Locate your system’s air filter, remove the old one, and insert a new filter. Make sure to follow the airflow direction arrows marked on the filter.

10. Check All Components

Check the air ducts for signs of mold, moisture, or damage. If you find mold or severe damage, consult a professional HVAC technician from companies like Elevate Home Services for further assistance.

11. Reassemble and Test

Reattach the vent covers using the screws you set aside earlier. Once everything is secured, turn the power back on to your HVAC system and run it for a few minutes to ensure proper airflow and operation.

What Are the Drawbacks of Duct Cleaning?

• Cost. Professional duct cleaning services can be expensive, and the costs may not be justifiable for all homeowners.
• Disruption. The cleaning process can be disruptive, often requiring the removal of vent covers and heavy equipment within the home.
• Potential Damage. If not performed correctly, duct cleaning can damage ducts, leading to increased energy costs or air leaks.
• Contamination Risks. If not properly maintained, the cleaning process can disturb dust and contaminants, possibly causing indoor air quality issues.
• Over-Cleaning. Some HVAC professionals may over-recommend duct cleaning more frequently than necessary, leading to undue expenses for homeowners.

Ways to Prevent Mold and Bacteria From Growing in HVAC Ducts

Preventing mold and bacteria growth in HVAC ducts is vital to preserving excellent indoor air quality and prolonging your HVAC system’s lifespan. If you want to learn how to clean mold out of HVAC ducts, there are several effective methods to eradicate and prevent them:

• Regular Maintenance. Schedule routine inspections and cleaning by a professional HVAC company like Home Elevate Services.
• Use High-Quality Filters. Replace air filters regularly with high-efficiency particulate air (HEPA) filters to trap mold spores and prevent allergic reactions.
• Control Humidity Levels. Maintain indoor humidity between 30% and 50% using dehumidifiers or air conditioners to stop moisture buildup.
• Seal Leaks. Close up leaks in the ductwork to prevent moisture from entering.
• Improve Ventilation. Ensure adequate ventilation in high-moisture areas like bathrooms and kitchens to reduce the chances of mold growth.
• Install UV Lights. UV germicidal lights installed within the HVAC system can kill mold infestation and other biological contaminants.
• Use a Mold Inhibitor. Apply an EPA-approved mold inhibitor to your HVAC ducts.

Keep Your HVAC Ductwork Spotless and Contaminant-Free

Most ductwork systems are extensive and will require some time to create a healthier living space. Now that you understand the process of cleaning HVAC ducts, you’ll find it easier to maintain them. If you’re also interested in ensuring your HVAC system runs efficiently, don’t miss our blog on how to clean HVAC coils, which play a crucial role in air quality and energy efficiency.

Even if you have the skills to care for them, hiring a professional air duct maintenance service like Home Elevate Services is usually the ideal choice. We have extensive knowledge about maintaining HVAC ducts and giving your building cleaner and fresher air.

Contact our company today if you have questions about our air duct maintenance services.