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

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Күн бұрын

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:
Article on VAV: aircondlounge.com/what-is-vav...
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 KZfaq channel, Yu has helped hundreds of homeowners and engineers on HVAC related matters.
If you find this video helpful, please like and consider subscribing to my KZfaq channel. I'll greatly appreciate that. Thank you.

Пікірлер: 19

@alokkumardubey1982 Жыл бұрын

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

@jasmineyiu8219 Ай бұрын

clear and informative !

@aircondlounge Ай бұрын

Great!

@goldennuggetinfo8468 9 ай бұрын

Great explanation!

@katuraysalad 2 ай бұрын

Thank you for this informative video ❤

@aircondlounge 2 ай бұрын

Anytime

@saravanakumar54 Жыл бұрын

Very youthful information thanks

@aircondlounge Жыл бұрын

No problem

@JaykeSapalaran-iq3qs 11 ай бұрын

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

@user-sg6qv8gn7q 8 ай бұрын

Good

@aircontrolserviceshotsprin1707 10 ай бұрын

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

@g_glop Ай бұрын

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

@aircondlounge Ай бұрын

I have not seen such a VAV damper, mostly are very basic ones. Designing

@alexekwueme7477 25 күн бұрын

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?

@aircondlounge 25 күн бұрын

I think in this case should recalibrate the VAV airflow in those rooms. The big room needs more airflow while reducing the airflow in the small room.

@alexekwueme7477 25 күн бұрын

@@aircondloungeso that means each duct that connects each room must have a VAV?

@aircondlounge 24 күн бұрын

@alexekwueme7477 It depends. If each room needs about 1500 CFM, then it is likely that every room needs a VAV box. Otherwise, 2-4 rooms can share one VAV box. Each room will then rely on the radial or OBD on their diffuser to adjust to their required airflow (eg: 150, 250, 700, etc.). If multiple rooms are sharing one VAV box and each room diffuser doesn’t have volume control damper, then small room will indeed be overcooled since majority of the temperature control comes from the big room because the big room contributes more airflow for the control.

@aircondlounge 24 күн бұрын

And the thermostat used to control the VAV is likely located in the big room as well.

@alexekwueme7477 24 күн бұрын

@@aircondlounge I think each room should have VAV and it's damper plus thermostat for full control of the air in the rooms.