Noisy fans and ductwork can occur in residential, commercial, and industrial environments.
So what are the causes of unwanted HVAC Noise?
- Mechanical issues with fans and motors such as bearings, belts, and vibration isolators.
- Transference of mechanical noise through duct work.
- Transference of noise from one space to another connected by common duct work. This can be intrusive sound such as speech, televisions, stereos, or musical instruments.
HVAC Noise In The Home
The most common HVAC noise issue in residential applications is the transference of sound from one room to another through common duct work. For example, high sound levels from a home theater can easily pass through the air vents through the duct work and into a bedroom. Mechanical noise can also be an issue in the home. This can usually be attributed to faulty heating and air conditioning components. A squeaky motor fan can transfer noise throughout the entire home.
When experiencing mechanical HVAC noise in the home, always have your equipment inspected by a qualified technician to insure it is operating properly.
HVAC Noise In The Workplace
HVAC Noise can be a problem in just about any work environment such as offices, classrooms, and conference rooms. Standard dropped ceiling tiles are ineffective in blocking noise that may be transmitted through the walls of the duct work. This is known as "break out noise".
In industrial workplaces, HVAC noise can contribute to raising the overall noise levels on the work floor. Noise from equipment vented to the outside environment may need to be reduced to meed municipal sound codes.
What's The Solution?
Unwanted sound passing through duct vents can be reduced or eliminated with the installation of HVAC Silencers. These are placed inline in place of a section of existing duct work, and work similarly to the muffler on a car.
Unwanted sound passing through duct walls can be reduced or eliminated by wrapping the outside of the duct with an acoustic barrier/absorber material known as lagging. In addition, standard ceiling tiles can be replaced with acoustic barrier ceiling tiles.