Soundproofing Ducts

Sound Control Challenge:

Your home furnace is designed to circulate airflow throughout your home to help regulate room temperature.   Noise is generated both by the motor fan noise from the furnace and the air flow noise moving through your duct system.   If your ductwork is undersized based on the power of your furnace system, this increases your velocity pressure as sound waves begin to break out through the walls of your duct system.   Our goal is to protect the rooms in your home from the noisy ducts and furnace noise.

Soundproofing Treatment:

If you are here in advance of new construction or a tear-out remodel project, you can replace standard ductwork with ductwork that is lined on the inside with sound insulation material.   If you are treating existing loud ductwork with no access to the interior of the duct, jacket the exterior of the duct with lagging material designed to hold the noise inside.   Either of these HVAC soundproofing treatments will help contain the noise to within your system and guard against the bleed out through the walls into the room you seek to protect.   Your product options for these treatments are listed in here in our Product Bin, and also featured in our section on Furnace noise in our Applications Guide.

Acoustic Result:

By lining either the interior of exterior of your ductwork, you are better able to contain the unwanted sound from air flow noise or motor fan noise that is otherwise breaking out through the walls of your ductwork.   The sound proofing treatment for noisy ducts and ventilation noise can typically trigger an average 10-12 decibel level drop.   These results for soundproofing ducts are simulated in our Sound Chamber for your reference.