How to Soundproof Air VentS

There’s a lot of information out there on soundproofing air vents.  In this article I want to share some of the best methods that I came across, as it may help others soundproof their noisy air vents too.

Remove & replace the air vent

Removing the vent is perhaps the best option when it comes to eliminating sounds from an air vent. It’s simple, effective, and won’t cost you much money to do.

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Cover the vent with soundproof materialS

You can use heavy MDF or drywall to cover the air vent and ideally two layers of Green Glue would be even better.

Upgrade the HVAC system

You might want to consider upgrading to a newer, more modern HVAC system. Modern systems use quieter technology, which will result in less sound coming from the vent.

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Install duct liner

Duct liners are fixed to the inside walls of the air vent and have a double sided liner. This is to prevent the liner from blowing glass wool fibers into the room when the air is flowing.

Install flexible duct

Because a flexible duct is bendy, it can reduce the amount of sound that leaks from the air vent. The way flexible ducts work in reducing sound is by creating bends in the duct.

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Install soffit

The only way to soundproof air vents and ducts that are directly exposed to sound will be by installing sound insulating soffits.

Create a sound baffle

A baffle usually consists of a box that forces sounds to travel a longer distance, thus absorbing and reducing the sound along the way.

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