Why does my ducts make noise?

The most common reasons to hear noise in your HVAC ducts include: Air Pressure: A buildup of pressure can cause rumbling sounds. It can also cause the metal to expand and contract. When the system comes on, air pushes against the walls of ducts, expanding them.

Why is my vent making a popping noise?

WHY ARE MY AIR DUCTS POPPING AND BANGING? One of the main causes for these loud noises are differences in pressure between the supply and return ducts. Another common cause is expansion and contraction due to changes in temperature.

How do I stop my ducts from popping?

Here are two ways to solve the problem:

  1. Seal and insulate your ducts. Wrapping your ducts in insulation should solve your “cold winter morning” heating duct popping noise. …
  2. Replace your ducts. Replacing your ducts is usually more cost effective than insulating them.

Why is my air duct rattling?

The rattling noise is most often caused by loose metal ducts that tend to knock against one another. This could be a sign that your ducts have leaks or gaps between them, which will ultimately have a negative impact on the performance and efficiency of your heating system.

How do you fix a noisy duct?

Solutions for Noisy Ducts

You can insulate your ductwork with fiberglass to muffle sound. You can also install fiberglass duct board instead of metal ducts to reduce noise. If your ducts are popping against the framing, use rubber pads to separate the framing and the ductwork.

Why are my ducts ticking?

There’s good news and bad news concerning popping or ticking noises coming from your AC. The good news is, this is nothing serious. The sound is caused by the metal air ducts expanding and contracting due to temperature changes when hot or cold air circulates through them. This is common in a lot of HVAC systems.