Is Your Air Vent Letting In More Noise Than It Should
Once you know what you want from the space youre working on, choosing the method you want to implement will be easy. Heres how to prepare the room with the vent for the work youre about to do:
But what are some of the things that indicate your air vent is letting in more noise from your neighbors or housemates than it should?
There are three main reasons for hearing everything through the vent:
So when youre looking at your vent, pay attention to those potential problem areas. This way youll know exactly whats missing from your air vent and even how to fix it. From here on out, its going to be a pretty common-sense type of project. Still, lets go through some ideas on how you can reduce the noise coming through your air vents.
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How To Reduce Noise From Return Air
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The air ducts and air conditioning systems in your building normally produce noise. However, the noise you hear inside your home will depend on how close or how far you are from your buildings air conditioning or HVAC system.
To reduce noise from return air in the vents, you can try opening the vents, cleaning the air ducts, resolving any ductwork issues, getting the right vents and grills, or reducing static pressure. If theres no problem, you can buy a return air sound baffle.
Read on as we talk about the cause of the noise in the air duct, and how you can do basic troubleshooting. You will also learn some return air sound baffle methods and how to provide your return air grill with sound attenuation.
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Stuff The Vent With Acoustic Foam
If you already have pieces of egg crate pattern acoustic foam lying around, you can use them to plug your air vent. Take some 3M spray adhesive and apply it to the flat side of one of the acoustic foam pieces. Then press that piece back to back against another one.
Once the adhesive dries, you can cut the foam to approximately the size of your duct. Its okay if you end up with a piece thats a bit larger than the duct. The foam will bend a bit and seal the space.
Lastly, theres another way to create a plug for your air vent.
Line Interior Of Ductwork
Another way to combat noise being transmitted to other areas of the house is to line the interior of the ductwork with a sound absorber, like Melamine foam. When choosing a product, be sure its fire safe for heating units and does not release particles into the air stream.
Melamine is popular as an HVAC noise reduction product because it has high sound absorption and thermal insulation properties and low flammability and smoke properties. Melamine foam is one of the older methods of insulating ducts and pipes, especially in large venues, and it has long been widely accessible as a soundproofer and insulator. Some may prefer alternatives to Melamine foam due to its concentration of formaldehyde. We also recommend Quiet Wrap Pipe Soundproofing Wrap. This will significantly reduce noise emitted from waste water and drainage pipes. Its an industrial grade barrier/foam composite manufactured using a 1/2 lb, high density sound barrier membrane, laminated to ¼ inch acoustic grade polyurethane foam with a peel-and-place adhesive backing.
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Make Your Home More Livable With Soundproof Cow
When you need soundproofing for your ductwork, mooove over to our site at Soundproof Cow and see our range of products available. While our jokes may be cheesy, you wont have a beef with our products or prices. Search for more soundproofing materials from our site to get great prices and the components you need to get a quiet, livable home.
Inspecting The Air Vent
But before you go on to soundproofing your air vent, there is one major step that most people ignore, i.e., examining the air vent. For choosing the right vent noise reduction technique, it is essential to understand:
All air vents can be broadly classified into two types Ventilation vents and HVAC Vents.
Ventilation vents are made for cross-ventilation between two rooms and are usually located above the doors, whereas the HVAC vents are responsible for temperature control within an infrastructure. There might be condensation in these door vents if they are blocked without proper insulation.
The shape of the air vent & its length determines the pathway that air, and sound, have to travel. Straight & short vents are always nosier than longer vents.
If there are enough barriers/walls in the path of the sound, the flow of air will be restricted. The sound waves will bounce off the surfaces, losing more energy, thus resulting in noise reduction.
Materials like aluminum & steel lead to louder echoes, creating more noise in the bedroom. Leakages & gaps in the air duct network can further lead to loud, hissing noise in the system, which needs to be catered to individually.
It is essential to identify and understand the problems in the ductwork to choose an efficient soundproofing method from the available alternatives.
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Have It Checked By A Professional
If you cannot figure out what makes your return air vents noisy, get an HVAC professional to do the job. Whether it is excessive static pressure, an outdated variable-speed blower, a problem in the central return, a lack of return vents, or any other issue, an experienced HVAC guy will be able to fix it.
Dont do any more trial-and-error or easy-fix solutions as you may end up doing more harm than good.
The Perfect Balance And Return Air Pathways
The Perfect Balance is typically installed in a bathroom or mechanical room door for the purpose of providing make up air for the exhaust fan. Without make up air, the vent fan, bathroom fan or exhaust fan cannot do its job: removing moisture and odors or offering relief.
Return Air Pathways RAPs are installed in walls between rooms for the purpose of connecting the supply and exhaust in an HVAC system. They are designed to allow air to travel from room to room without compromising privacy. And just as important, they will balance your system and help eliminate hot and cold spots in the home even when doors are closed.
Go to our FAQ Page to learn more.
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Causes Of Noise From The Return Air:
Usually, you can hear some noise from your air vents. Its natural and normal. But if you notice that the noise has increased in volume or become more uncomfortable or bothering you with flapping, rattling, or any other type of unusual noise, it means that theres a problem somewhere in your system. Its restriction mainly causes it in airflow due to increased pressure.
In such conditions, you must check the cause of noisy vents, weather supply or return before it causes any severe damage to your HVAC system. If there is no adequate airflow, your HVAC system will work hard as double. HVAC is more vulnerable to breakdowns and injury and consumes more energy.
These airflow restrictions may be caused by different things, including:
- Dirty Air Filter
- Closed Duct Dampers
- Debris Stuck in The Ductwork
Another factor is there will be positive pressure. The conditioned air can push out of the rooms via small cracks and structural gaps. In that case, you will need to seal your duct.
The unusual noisy sound may also be caused by leaking return ducts it can draw outside air into ductwork instead of circulating air from the vent.
If there is a leak in the return duct, extra air will be added to the system and affect the balance of the atmosphere in the house or office.
If the noise from the return vents is not usual or louder than the average volume, you may need to troubleshoot.
Lets get started on the steps of return air noise troubleshooting.
One Way To Treat Equipment Noise Is To Reduce The Sound At Its Source
Applying a vibration-damping product, like Vibra Block® Sound Deadening Material, to the interior or exterior surface of the unit will help reduce the noise vibrations the system creates. These vibrations will be stopped at the source and not be able to travel along the ductwork and throughout the house.
- Vibra Block® is a premium, industrial grade sound deadening material. Constructed from a high performance vibration-dampening polymer, it offers excellent HV/AC soundproofing. With its peel-and-place backing, its easy to install.
- Vibra Block® is well-suited for HVAC noise reduction because its designed to effectively dampen sound on any type of steel including galvanized steel, stainless steel, plated steel and more.
- Vibra Block® can also be applied to the ductwork itself. Insulating ducts with a soundproof material will not only quiet the noise caused by HVAC systems and airflow, but it will also reduce your energy costs because it offers thermal protection.
If youre looking to save money, you should also consider that Vibra Block® is an economical method of HVAC noise reduction. You would have to spray an entire surface with a standard sound-deadening spray to get as much sound reduction as covering only 60 percent of the surface with Vibra Block®.
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Difference Between Supply And Return Air Ducts:
The supply air ducts are responsible for delivering cooled or heated air from youre A/C to each part of your house or office through supply air ducts.
After the air is passed through a room, the other duct, called the Return air duct, as discussed above, draws the air out via separate air vents and then transports it back to youre A/C or HVAC central units for reconditioning . The air gets recirculated through the same process.
The air distribution system of your house or office is closed-loop. It recirculates the same amount of air through all of your rooms. The supply and return air vents are different in terms of airflow. In supply vents, air flows out of the vents, while in return vents, the air flows into the ducts to complete the cycle.
Returning the air to your furnace of the A/C, return air ducts also incorporate the filtration system of the air it ensures that you have good quality air indoors. Mostly the filter is behind the return vent. It also prevents dust, dirt, and other particles from entering and causing your HVAC systems severe damage.
Final Thoughts On Reducing Noise From Air Vents
Hopefully, one of these methods will solve your noisy vent problem. Ultimately, youll need to choose the appropriate solution depending on your needs and the needs of the room.
If youre not really using the vent anymore, its best to cover it entirely. However, if you still need the airflow, you can use one of the last few techniques to get the quiet room of your dreams.
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We Also Recommend Quiet Wrap Pipe Soundproofing Wrap
We also recommend Quiet Wrap Pipe Soundproofing Wrap. This will significantly reduce noise emitted from waste water and drainage pipes. Its an industrial grade barrier/foam composite manufactured using a 1/2 lb, high density sound barrier membrane, laminated to ¼ inch acoustic grade polyurethane foam with a peel-and-place adhesive backing.
Quiet Wrap Pipe Soundproofing Wrap is perfectly suited to pipe noise reduction. It works on PVC water pipes or cast iron waste water pipes of any size, it wraps easily around your pipes with a peel-and-place adhesive backing, and its foam component isolates the barrier and dulls vibration sound, which is a large factor in water pipe noise.
So The Question Arises Can You Sound
The simple answer is: NO.
Luckily, there are a few things that can be done to stop noise traveling through vents above the doors without completely blocking the airflow. Whether you are a budding YouTuber or a musician or a corporate, your sound-proofing needs & objectives will be different.
Based on your sound-proofing need and level of air flow needed in a room, a choice can be made from several alternatives.
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Cover The Vent With Soundproof Curtains Or Blankets
Of course, one of the easiest ways to soundproof your air vents is to cover them with soundproof blankets or curtains. Ive already written about just how magical both of these products are. Essentially, theyre thicker and more densely woven than regular blankets or curtains .
While all of these tips would be easier to apply to wall vents, you could even do them for ceiling air vents. If youre installing a regular soundproof or moving blanket, you can nail it to the wall or ceiling. However, grommeted blankets would be easier to hang like curtains.
Or, you can save yourself the hassle and just get the soundproof curtains. Install a curtain rod on the wall above the vent or along the ceiling and hang the curtain, making sure that its pooling on the floor. This will ensure that youre fully covered and it would thicken up your walls as well. Still, Id use this tip with one of the following two air vent soundproofing methods.
Supply Air Ducts Vs Return Air Ducts
To better understand the concept of return air, you need to know the difference between supply air ducts and return air ducts. These two are separate halves that make up the entirety of your homes or your buildings heating and cooling air distribution system.
The supply air duct is responsible for delivering heated air from your furnace, cooled air from your A/C into each part of your house or building through the supply air vents.
After the air has passed through a room, the return air duct draws it out via a separate air vent then transports it back to your HVAC or A/Cs central unit to be heated or cooled again. The air then gets recirculated and goes through the same process again.
So, to put it simply, supply and return vents differ in terms of the airflow direction. In supply vents, the air flows out of the duct. Meanwhile, in return vents, the air flows into the duct. The air distribution system of your house or building is a closed-loop, and it continuously recirculates the same amount of air throughout the rooms.
Aside from conveying the air back to the furnace or the A/C, the return duct also incorporates the air filtration system, which ensures that you have good indoor air quality. The filter, which is typically behind the return vent, prevents dirt, dust, and other contaminants in the air from entering the HVAC system and causing damage.
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What Causes Noise From The Return Air
To hear some noise from your air vents when your HVAC system or A/C runs is normal. However, if you notice that this sound has increased in volume or has become a bit more bothersome with rattling, flapping, or any other unusual noise, it could mean that theres trouble somewhere in the system. It is most likely due to increased pressure that is brought about by a restriction in the airflow.
As such, you must address the cause of noisy supply or return vents before causing any serious damage to your HVAC system. An HVAC system works doubly hard if there is no adequate airflow, therefore consuming more energy and becoming more vulnerable to damage and breakdowns.
Airflow restrictions may be caused by several things, which includes:
- Dirty air filter
- Closed duct dampers
- Debris stuck in the ductwork
Unusual noises may also be caused by leaky return ducts, which pull outside air into the ductwork instead of leaking air. As a result, extra air volume is added to the system, which tips the balance of air in the house.
Thered be positive pressure from neutral pressure, and the conditioned air gets pushed out of the rooms through small structural gaps and cracks. If this is the case, you will need to seal your duct.
If the noise coming from your return vents is not its usual noise or is louder than its usual volume, you might want to troubleshoot first. Lets go over on what you need to do.
