My furnace fan makes so much noise. Would replacing its filter help with noise reduction?

Answer

Replacing your furnace's filter fan can definitely help if the filter is dirty. It's like a vacuum when it's set to "low" or when a fan tries to suck air through a dirty filter--you hear the noise difference. The difference can be more or less noticeable depending on how dirty the filter is and if the return duct is sized correctly.

Updated on March 26, 2018

Original Article:

How to Quiet a Noisy Furnace
By Dan Robbins
working