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SOLVED - How To Reduce Noise From Return Air: Tips And Tricks SOLVED - How To Reduce Noise From Return Air: Tips And Tricks

How To Reduce Noise From Return Air: Tips And Tricks

Nowadays, every house homeowner understands the importance of having a functional HVAC system: without that, it’s tough to regulate the temperatures inside the house. That being said, while the designs indeed receive various refinements, the usage of HVAC systems still experience a few issues. One common complaint about such systems is the noisy air return vents which prove disturbing. Actually, there have been many debates and discussions regarding how to reduce noise from return air of HVAC systems, each offers unique explanations and solutions.   

Frustrated by the noise coming from the air return vents but don’t have the time to read all the troubleshooting guides on the net? If that happens to be the case then you have come to the right place? This article would show you practically everything that you must remember while attempting to address the noise from return air.

Noisy Air Return Vents: Possibilities

A lot of things could influence the performances of HVAC systems but once it comes to air return vents making vexatious sounds, you should keep mind the suspects down below:    


  • Clogged Air Filters/Air Ducts 


As air return vents constantly suck air, particles tend to accumulate in the filter, ducts,…  which eventually lead to clogging. Once that occurs, the HVAC system of your house is going to produce decreased airflows as well as annoying noise. Fortunately, a thorough cleanup would be good enough to take care of your noise trouble. If you have the knowledge and the tools, feel free to proceed on your own. On the other hand, in the case you lack confidence, it’s widely advised that you contact professionals so as to avoid causing accidental damages.   


  • Incorrectly Installed/Poorly Done Ductworks


Some homeowners want to save money so while checking out offers of HVAC installation, they select the cheapest deals available. Unfortunately, places/people that offer such deals often cut corners to keep the prices low. For instance, they pair large return vents with small ducts. As a result of too much air being forced into confined space, you start hearing whistling sounds from the vents. Another issue that could cause noise is the lack of lining in the return duct: without duct lining, the vents get markedly noisy in use. 


  • Many Dampers Happen To Be Closed At The Same Time 


Hopping to balance the temperatures between sections of the house during season changes, a couple of people close certain vent dampers of their HVAC system. Usually, everything would work out just fine even if you keep several vent dampers closed. However, if you close many dampers simultaneously then you may overly restrict the airflows in the ducts which create multiple troubles including noisy return air. Because of that, it’s strongly recommended that you consider keeping all the vent dampers of your HVAC system open.   

What Needs To Be Done

Different problems require different fixes but in the case you want pointers on how to reduce noise from return air, check out the following suggestions: 


  • Apply Adjustments To Fan Speed 


In order to maximize airflows, a few HVAC installations set the speed of the blower/furnace fan far too high. That tends to increase static pressure inside the system which makes things noisier than usual.  To address the noise in that situation, all you have to do is to decrease the speed of the fan. As the duct static pressure drop, the noise is going to vanish without a trace. Still, it’s worth noting that the method is only effective if the speed of the fan is already too high in the first place. 


  • Think About Adding Additional Ductworks 


It’s a breeze to nail the size of the parts of HVAC systems but the ducts require significant considerations. In a few cases, the size of the ducts just proves to be so small that airflows have considerable difficulty passing through in adequate volumes. Once airflows experience obstructions, irritating sounds would inevitably come out from the air return vents. But by ramming up the ductworks, you should be able to lessen the noise coming from the vents without fail. Of course, you must plan carefully to determine the ideal locations for the new ducts. 


  • Set Up A Bypass Duct 


You already have lots of ducts in your HVAC system? If that is so, installing a bypass duct could help. Such a duct is going to relieve the static pressure within the system which reduces noise to a certain degree. 


  • Expand Grilles And Supply Registers


Various experts on HVAC systems claim that most homes these kinds of days simply don’t have enough return air. So to address the static pressure as well as associated noise, it’s a good idea to expand the grilles. In addition to that, tying new supply registers to the ductworks is an excellent way to get the air moving. 

Hard Pipes Vs Flexible Ductworks

If the setup is done properly, both hard pipes and flexible ductworks would perform well in most of the cases. Nonetheless, on average, hard pipes tend to be much noisier than flexible ductworks in use. In exchange, the possibility of failure in flexible ductworks is higher compared to hard pipes. So if you want to keep the noise down at all costs then it’s strongly recommended that you use flexible ductworks instead of hard pipes in your HVAC system. With flexible ductworks, you could truly have peace of mind. 

Essential: Don’t Be Afraid To Call In The Pros

It’s indeed possible for homeowners to take care of the noise from air return of HVAC systems by themselves. That being said, if you have tried virtually everything you know without seeing positive results, don’t hesitate to get in touch with HVAC engineers. These well-trained professionals know all about how to reduce noise from return air so they would be tackle the noisy vents in no time. While you need to pay a small fee for the service, it’s still better than putting up with the frustrating sounds from the vents. 

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