Duct Pressure Overview

A week or two ago @BJMMA31 tweeted me a question about duct pressure loss in ductwork and I thought it would be good to discuss that this week. Here is a brief overview of pressure loss in ductwork and how you can calculate it. (Sorry, this one is a little longer than 8 minutes.)
If you have any questions you would like answered, post them here or ask me on Twitter. I'm @JennySivie :-)

[@will-smith-nh]

Excellent video.
Thank you.

[@Blueblurr112]

I just found your channel great videos. Thank you.

[@NSWHVACAcademy]

Glad you like them!

[@thequran3604]

@JennySivie I really appreciate you. Very informative content added. Awesome explain Bernoulli's principle.

[@deltatmechanicalsystemsair2596]

I love your videos!

[@rakesh.procky5588]

Hello Jenny, Could you please share the excel spreadsheet for the fan static calculations?
The calculator sheet I am using is the complex one, it will more helpful if you share the spreasheet.

[@erikrezlman7900]

Two thumbs up!! Great breakdown of a fairly complicated subject for novice like me.
If I send you my plans, can you put together a system for me? Let me know pricing. Thanks

[@BryantJ31]

Very informative thank you

[@NSWHVACAcademy]

Glad it was helpful!

[@mohammedmujtabaiqbal3059]

I really appreciate the work you are doing its really helpful. I would like to contribute in anyway I can. I have been working on construction projects and would like to help in anyway I can.

[@yuvrajgangji5100]

All things nicely explained a big thumbs up👍👍
Just one thing I m bit confused is how velocity pressure affects pressure drop.. Does increasing the velocity pressure which in turn increases the velocity increase pressure drop?

[@asimmohammed6022]

What if there is elevation difference between then there will not be constant in the bernouli equation. Kindly clarify