How to silence a whistling heating duct with a bypass damper
In short: A noisy heating system can be a constant nuisance. This tutorial shows you how to install a forced-air bypass damper to quiet your home's ductwork.
The video demonstrates a practical home improvement solution for silencing whistling ducts. By installing a bypass damper, you effectively connect the return duct to the supply duct, allowing for a quieter airflow.
The process involves marking and cutting holes in both the return and supply-side ducts using a sheet metal duct cutter. You then screw on start collars, attach elbows to the ends of the bypass damper, and secure the damper between the two collars.
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Sources
- Summary by Intellect · source: How to Install a Forced-Air Bypass Damper | This Old House
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