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Why Your Ductwork is Making Noise & How to Stop It 

Grill for vent

Why are your HVAC ducts making noise? This kind of noise can be very disruptive because the ducts run throughout the home. You may feel like it follows you everywhere once you notice it. There are things you can do to stop the noise. Below we will explain what might be behind the sounds and how to quiet noisy ducts.

1. Duct Expansion

When your ducts are cold and your furnace first turns on, then you may hear a heating duct expansion noise. The metal in the ducts is sensitive to temperature and expands when it heats up. You should only hear this noise about once per year and it is nothing to worry about. The same goes for using the air conditioner while your home is quite hot. If you use a smart thermostat and you happen to be home when it starts your furnace up again from cold temperatures, then you may hear it again.

2. Pressure Problems

Popping, banging and some other air duct noises may be due to pressure problems. If this is the case, how do you stop the vent from banging? You need an HVAC professional to fix the underlying pressure problems in the system. This is usually due to a mismatch between the furnace’s capacity (or the air conditioner’s capacity) and the space in the vents. Or it may be due to poor vent installation or other issues. Your HVAC technician can let you know what needs to be done to resolve the issue.

Is your ductwork making noise? Reach out to your local ClimateCare and they would be happy to assess and fix the issue.

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3. Furnace Noises

If your furnace is making a noise, you may attribute it to the vents by mistake. Your air ducts can carry the noise of a struggling furnace throughout the house and many of the sounds, especially banging, may seem like they are caused by the vents when really it is the furnace.

If you’re not sure whether your furnace or your air ducts are making the noise, you should certainly call an HVAC technician. Furnace sounds can indicate serious problems with the unit, which may result in breakdowns, do significant damage or, lower the furnace’s efficiency. To rule out these kinds of issues you will need a professional diagnosis.

4. Animals

Unfortunately, in some cases, the sounds in your HVAC ducting may have nothing to do with the system itself. It is possible that a rodent or bug infestation has made its way into the ducts and caused the sounds that you’re hearing. If you also notice droppings or know that you have an infestation, it’s wise to reach out to pest control to rule this one out.

You can make your ductwork less appealing to animals by getting your ducts cleaned out regularly by your HVAC technicians.

There are several potential fixes for furnace noise reduction. The expert technicians at your local ClimateCare can help you. Reach out today to learn more.