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Why Does My Ductwork Make Banging Noises?

Air duct system in a residential crawl spaceIf you live in an older home with outdated ductwork, you’ll likely start to hear loud banging noises coming from your system at some point. But what causes these noises and how can you stop them from causing you headaches?

In this blog post, the ductwork and insulation experts at Gold Star Insulation explain the most common reasons for banging noises in dated ductwork and how to prevent this issue in your California home.

What Causes Banging in Ducts?

When your heating or cooling equipment is turned on, you might start to hear loud thuds, clanging or banging noises coming from your ductwork. There are several common causes of this, including:

  • Blockages in ductwork: Dust, debris and small objects can get trapped in your ductwork, restricting airflow and creating pressure buildup that can cause loud banging noises once the pressure releases.
  • Clogged air filters: When your air filters get clogged, it can hinder airflow, leading to pressure irregularities in your ductwork that can result in loud banging noises.
  • Expansion & contraction: One of the most common reasons for ductwork to start making banging noises is the expansion and contraction of the metal as heated or cooled air passes through, causing popping or banging sounds.
  • HVAC system age: If you have an older HVAC system with loose or damaged components, these can cause disruptions in your ductwork that make loud noises during operation.
  • Loose duct connections: As your ductwork ages, it may become loose or disjointed over time. These loose connections can create gaps in your system, causing rattling or banging sounds as air passes through.

How To Stop Your Ducts From Making Noise

While banging noises in your ductwork can be disruptive, there are plenty of things homeowners can do to prevent this problem from causing an unnecessary headache.

Here are a few of the ways you can stop ductwork from making excessive noise:

Clean Air Filter

Prevent pressure buildup in your air ducts by cleaning or replacing your air filters at the proper intervals. It’s recommended that you clean or replace air filters at least once every 90 days.

However, you may need to do this more often if you have pets or allergies, or live with immunocompromised people, such as infants or older folks.

Clean Your Ductwork

Professional air duct cleaning is a great way to eliminate the buildup of dust, debris and other obstructions that can hinder airflow and contribute to loud banging noises. Using a powerful vacuum and bristle brush, a technician will dislodge and remove any blockages in your ductwork so you can use your HVAC equipment with confidence.

Insulate Your Ductwork

Proper air duct insulation can help soften any noises from your ductwork. Adequate insulation around your air ducts can also enhance energy efficiency by minimizing air leaks and ensuring your HVAC doesn’t have to work harder than necessary.

While DIY ductwork insulation is possible, it’s always best to trust a professional with your ductwork insulation needs.

Replace Your Ductwork

If your ductwork is over 15 years old and has gotten noisier, it may be time to consider replacement. Upgrading to pre-insulated ductwork can help eliminate excess noise while strengthening energy efficiency and prolonging your HVAC system’s lifespan as a result.

Always trust a professional technician to ensure your air ducts are installed properly and in compliance with current building codes and regulations.

Replacing Damaged or Old Ductwork

When your ductwork is outdated or noisy and needs replacement, Gold Star Insulation offers the ductwork replacements Sacramento residents have trusted for years. Our commitment to keeping your home comfortable, safe and energy-efficient is reflected in our unparalleled dedication to delivering service excellence.

Get the high-quality products and services your California home deserves — call 916-229-8445 to schedule ductwork replacement or insulation today.

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