Good explanation! One important note to add is that all of these affinity laws only apply when there are no other changes in the system. I.e. there is only one change that is made (speed, impeller diameter, etc), and all else in the system stays the same.

Happy Hols

Does static regain also apply to water flow?

Thanks for this great video. Can you please add some pictures or a video of the actual sensor installed on a VAV box and connected to a VAV controller?

Excellent

This was helpful because BMS tech at work is telling us to swap out a direct thermostat for a reversed

Sooooooo helpfullllllllll :)

As a former aircraft mechanic who decided 20 years ago to go into HVAC this is really good information👍

Hi, thanks for your great technical guides. Regarding the video you shared, we have a concert hall within our project. The HVAC designer has proposed a UFAD system with an air diffuser under each individual seat for warm and cool air supply. Is it a justifiable design as the air is coming out just in place where people are sitting? Can the air flow be annoying?

Appreciate the video, thank you.

I love you

Awesome video. Concise and straight to the point thank you very much

Thank you for sharing the video! Based on the lost of pros and cons, there is non much in favor of using the open loops?

Ive noticed that on some AHU's with either an abrupt transition connected directly to the discharge or even some with an attenuator/silencer within a few feet of the discharge, I have measured negative static pressures rite there at the blower outlet making it impossible to get correct TESP measurements . I usually will measure my supply static after whats causing it, ie after the silencer but not sure if its a reliable reading or not. I understand static regain and lower pressure/higher velocity through a restriction but not sure what to do when I read like -0.4 12" downstream of blower where youd think it would always be positive pressure. Any advice or can you do a video on this? Im sure im not the only one who experiences this, thanks

I was confused, you kept saying V= 2000 divided by the area/ devided by 144 . In both examples at 5:40. But its X 144 not divided by 144. So V= Q divided by A X 144

future' vedio please make vedio how we can get the ∆pvnom value of vav.and Testing procedures of vav.

Thanks for the video, now it's clear to me the difference between lay-in and surface type diffuser. Cheers!

These videos are very well done! Controls for the layman-easy to understand and perfectly paced. Keep up the great work.

❤

Hi

Thanks to give the HVLS industerial fan lesson

Hi

Thank you mam

This is MR Noman

Hi

I want to take a class

Hi

This is just a reupload of a decade old Titus video. What's the point?

The way that you teach is very simple to understand and very clear, excellent

Love you darling

Great information. I guess they don’t want to get stuck with all those 410a units that are sitting in the warehouses.

Can you please make a video on sound traps used in HVAC

Simplicity of your teaching is amazing!!!❤

Love you so match i like you and your video

I love you t sir

I love you

I love you t sir

hi

Amazed by your simplicity of explanation.....

Did not know that

It's a very informative vidio. Can you make vidio on equipment (FCU, VAV, RTU etc.) Selection of HVAC?

Love the videos!!! Thank you.

bravo hvac lady

bravo lady

Make the same video for a closed circuit chilled water piping system

The date is April 29 per the CEC extension

How do you insulate the diffuser? Thinking of spraying a rubber coating on inside and out to help keep the diffuser from getting too cold and hopefully prevent the sweating diffuser.

Could you slowdown your instructions....a bit slower will be better... remember your teaching person's who are beginning to learn this topic.

Toooooooo fast... Jus say'n

Professor, is there a simulation program for cooling and heating systems for mechanical and electrical parts and control circuits? Thank you.