Constant Air Volume - CAV HVAC system basics hvacr

Constant air volume hvac system basics. In this video we look at the basics of CAV ventilation system covering cav constant air volume systems used in hvac ventilation design, cav terminals, ahu air handling units, heat exchangers, reheat coil, dual duct, where and why cav systems are used.

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[EngineeringMindset]

⚠️ *This video took a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕

[qpSubZeroqp]

It's amazing how little people think about the future use compared to ”It's cheaper? Perfect! Just install that one!” or ”Yeah, we can just fix it later.”

[STEINYY]

I liked the CAV HVAC System video you did a couple of years ago but this one was, well better explained I must say.

[ironmatic]

Dual duct systems were extremely common in the 60s through the 80s in the US. At my university here in Texas, all the original dual duct systems from the 70s are still going, complete with all the ancient mixing boxes, tiny high static hot/cold deck ductwork, pneumatic thermostats, and the enormous custom AHUs literally built into the buildings. Interestingly enough, one of our buildings completed as late as 2008 has a dual duct system. Dave McFarlane has an interesting writeup on old systems called "Retrocommissioning older buildings."

[wolverineadamantium]

Thanks for the PDF file I hope HVAC pdf file is also available. this channel is awesome

[avejst]

Interesting as always 👍
Thanks for sharing 👍😀

[ashleygilliam]

As always videos are great. Have you thought about adding a multizone CAV system to your examples? I've been looking for more info about them, but there's not a lot out there. Seems similar to the dual duct system but the individual zone dampers/actuators are at the AHU with multiple ducts feeding the different zones. Thanks!

[raheemkhan]

Very nice sir. time is no issue understanding is important 😊

[JK-dxzb]

Could you pls make a video to talk about duct sizing using static regain method with some examples? Thank you.

[rayzard]

Please make a detailed video about transistors and their uses, types, working and why they are revolutionary invention
I know that there are many videos about transistors but your animation and explanation is best 😁

[noone]

easily explained video, as always. @4:33 the total flow rate is fixed, but to the individual diffuser, with the help of damper, we can decrease the individual flow rate (e.g. to 3 cubic m/s) although the total flow rate (e.g. 20 cubic m/s) will remain constant, right?

[markoler]

Would a VAV control system also require cooling at the AHU as well as reheating for the VAV box terminals? Is there a substantial difference in this way between CAV and VAV? Or is it solely due to the modulation of air volume (and furthermore, heating) for the individual rooms in a VAV system that saves energy?

[raffycapati]

thanks a lot for these learning materials. Maybe just put radius also on the duct work illustrations since these 90 degree designs creates air losses on the system.

[johndecarlo]

Paul can you please make a load calculation video?

[drsovanghosh]

Sir please make a video on motor driver..

[AneesIsmaeel]

Do you have video or book about HVAC design in Pharma industry .where some room must be positve pressuer and other is negative ...etc

[marshallnmoonshine]

Just a mention that CAV’s are still used in places where the air exchange per hour (ACPH) is required.
I work in a decent-size modern hospital and air-turnover is critical to pass inspections.

[wyndhamcoffman]

So I'm curious; if they have to chill the incoming air to a set temperature anyways, then reheat the air at the point of use; why not use a heat pump to simultaneously chill the air coming into the building, and heat air at the point of use?

[Tiktokgirls]

Hi, would you mind if you make some more videos about water system in hotel or in the house ?

[raghavar]

Please do videos on generator working please.... TQ