Variable Air Volume (VAV) System Explained - Components, Working Principle, Pros & Cons

Variable Air Volume (VAV) system is a type of air distribution in HVAC. It is made up of several components, not just the VAV Boxes. The VAV components work together as a system to improve the energy efficiency of the air conditioning system. However, there are also times where a VAV system might not be a good idea. This video explain it all.

0:00 Introduction
0:24 What is VAV
1:10 VAV Box
5:10 Thermostat, VSD & DPS
6:39 VAV Working Diagram
10:46 Why VAV
12:55 Disadvantages of VAV
15:51 Conclusion

More on the subjects mentioned in this video:

Bio: Yu worked as a professional in the HVAC industry for more than 7 years. He is an engineer who has a passion for blogging and content creating. Ever since he created aircondlounge website and YouTube channel, Yu has helped hundreds of homeowners and engineers on HVAC related matters.

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[alokkumardubey]

This vedio is very helpful for HVAC technician .Hey I am Indian

[GalacticAdventures]

Also, maybe explaining what is heat balance and it's importance. How to calculate total system efficiency. How to also size cooling towers and pumps

[GalacticAdventures]

Would be delighted to watch more videos from Energy Efficiency/ Green Mark point of view. Also, comparing different cooling systems or brands or system designs for their efficiency. Also, maybe explaining what is a water cooled packed unit? etc. Many video opportunities here. Thanks in advance

[aircontrolserviceshotsprin]

What about series VAV with fan powered box how to set up

[katuraysalad]

Thank you for this informative video ❤

[JaykeSapalaran-iqqs]

Great video information 👍❤
Thank you for sharing your knowledge and experience 🇵🇭🫡

[alexekwueme]

Thank you for the video. Please I want to know what happens when the big room temperature is higher than the setpoint; say 25°c, the medium room is 22°c, and the small room is 18°c. How does the AHU and the BMS handle this situation?

[g_glop]

are there VAV boxes with Larner–Johnson type valves? partially open buterffly valves produce turbulence at high CFM which is not only noisy but also increases pumping losses