duct noise silencer

How to Install an Air Duct Noise Silencer?

Do you know why air ducts are so important? If you have an HVAC system in your home or office, you must understand that these ducts transport conditioned air across the building. Though these are pretty useful, there are several associated problems to deal. While we cannot overlook duct cleaning for better health, how can we ignore the annoying sound emerging from the system? So, this article will highlight how to install an air duct noise silencer.

You need to know more detail about the speaking tube, if you love peaceful environments or don’t want distracted employees. The HVAC speaking tube is usually combined with upsetting pops and booms that echo into quiet spaces. Hence, it may cause disturbance and frustration for the people.

One great way to deal with this is the air duct noise silencer and stifle these disturbing noises.

Why Does HVAC Ductwork Make Noise?

Common sounds that emerge from the HVAC ductworks are nags, bangs, screeches, buzzing, clicks, and snaps. It may happen when the conditioned air starts to force its way through the ducts.

Usually, the thin metal sheet within the ductwork bears these abrupt pressure changes caused due to airflow. It expands and creates these noises. Bangs and pops also became audible after Air Duct Cleaning LawrencevilleThe reason is that the airflow may make the duct expand in this manner which was previously hindered by dust and debris. So, filthy and unclean ducts can generate noises if you don’t get them cleaned timely.

Deferred ignition, stunted ductwork, and the duct joint are some other reasons that may cause unusual ductwork noises. So, you need to identify and address this before you hunt for an apt and effective solution.

The duct size, width, and shape also have an impact. Round or circular ductworks can better manage air pressure than angular ducts that conveniently pop and bang. Residential ducts are usually manufactured of thin metal sheets that quickly expand and create noise.

The startling noises from ductwork might alarm you, and you may consider it as a cause of concern. But you don’t need to worry. A majority of the ductworks generate noises for no reason. So, you should contact Air Duct Sanitizing Lawrenceville only in case of malfunctioning.

Such noises can bother a peaceful environment, so you must have the expertise to install the ductwork noise silencer and improve these effects.

What is an Air Duct Noise Silencer?

The ductwork silencers are designed to normalize airborne sound waves that vibrate within ducts, open in buildings, attachments, or noisy equipment.

So, duct silencers effectively cut down the noise that emerges from the duct or the sound that penetrates the duct from elsewhere. The silencers are fixed close to the noise sources within the ventilation duct. Some examples include fans, air flow regulators, air dampers, fire dampers, and air handling units. 

Experts may install these as a part of the bare ductwork. The reason is the appealing design and compatibility with other apparatuses of the ventilation system. In most cases, experts fix the silencers between the fan, exhaust fans or diffusers behind the fans.

You may use it in the central ductwork or add-on during the formation of branch-offs as per your requirement. These are designed to regulate noise that emerges from the airflow in elbows, t-pieces, or air dampers.

Installing the HVAC Silencers

One of the most typical complaints clients make regarding the heating and cooling system is the disturbing noise they emit. Sometimes, it may hint at a problem like an impaired blower or valve, but most of the time, it is due to normal operations.

This problem is more likely to affect commercial buildings or workplaces, as disturbing noises can affect their bottom line. The office environment needs to be peaceful for the workers to concentrate, while hotel guests would not welcome any disturbance. The same is true for restaurants, medical centers, and much more.

As silencers are becoming important day-by-day, some things that pros consider when installing them are as follows:


When installing silencers, location is crucial. You should consider the most effective spot, silencer type, the position of the mechanical room, and how peaceful the busy spaces need to be.

When evaluating the unique restrictions and building requirements, the key things to keep in mind are the breakout noise notion. As most of the HVAC noise flows out from the vents and registers, some sounds may enter indoor spaces via the ductworks, known as breakout noise.

So, always consider the breakout noise when you install the silencer. Try not to install it much faraway downstream from the primary source of the sound. However, if you cannot plan accordingly, your customers will be unhappy. Dissatisfied customers mean less business and compromised profits. So, you have to choose.

Air Pressure Balance  

Another significant consideration when installing the silencer is the association between noise control and air pressure. A majority of the silencers feature baffles that are auditory media made up of millions of air pockets. So, when sound waves contact these air pockets, it bashes the molecules together and turns the sound energy into heat.

It efficiently diminishes sound and also generates a pressure drop within the airflow. The fans in a heating and cooling unit generate pressure, forcing the airstream ahead. Any blockade in the airstream, like baffles in the ductwork silencer, creates backpressure and cuts down the fan’s power that hinders the airstream. So, for smooth airflow, you need to balance the pressure drop permitted by the fan with the air resistance generated by the silencer.

Planning is Important

Before you install a silencer, you need to plan. For this, you should examine the situation and unique requirements of the building, equipment, and dwellers. You should know that sound waves travel in unpredictable ways, so the link between the ductwork, HVAC systems, and silencers can be complex. Planning can help in effective installation. Otherwise, you may tend to make many blunders which means poor service and unhappy customers.

Also Read: How to measure head for a helmet?





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