Air Duct Calculation explained
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- čas přidán 7. 01. 2023
- Espanol: • Cálculo del conducto d...
Polish: • Wyjaśniono obliczenia ...
Knowledge is power, so although we can't always correct the problems we see with duct work, I'm hoping that with some knowledge we can make some little changes that may make a big difference in the performance and efficiency of existing systems. through my videos, I'm hoping it lights the inspiration for you to look farther and learn more, these are just a stepping off point, good luck and keep learning .
Book recommendations:
1.) Understanding Manual D® - Residential Duct Systems: www.amazon.com/dp/189276542X
2.) Manual D - Residential Duct Systems:
www.amazon.com/dp/1892765438
I like how you mentioned either starting at the furnace or working backwards. Working backwards is the easiest for me.
WOW…all this great info and you know what a TRX is also….we have monthly training sessions with our techs and your videos may pop up once and awhile! Wish you had a Calgary branch!!! Thanks
glad your checking out our videos, more to come, duct layout new construction, how different filters affect static pressure and more, stay tuned and thank you..
100% agree about rules of thumb. A lot of guys oversize furnaces without considering ductwork size, which results in a lot of expensive repairs.
Just got scammed like that, scam artists at best.
Part two coming soon, sizing the trunk line in a new construction home.
hello, thank you for posting this video.
when is the second part coming up?
@@CCNA911 sorry, I've been so busy, I will try to get it posted this month ( I hope ) I have a few more duct layout / design / sizing videos in mind, I will get them out soon. Thanks, Brian..
@@abledistributors thank you! Looking forward to it
@@CCNA911 NEW VIDEO up on channel, its a simple easy duct sizing video, check it out.
Very clear.
Fantastic presentation!
thank you for checking out my video, more videos coming soon, Brian.
Thank you!
Thanks for checking out our videos, more to come !
great job!
Thank you, I've got about 50 more videos to get done, stay tuned.... Brian
Great video
Thank You ! I'm hoping to do some on site videos of interesting jobs, like today 1,300,000 BTU boiler install... stay tuned.
new video up, sizing ductwork shortcut, check it out.
Is there software to design duct systems
absolutely, you can find software for almost every aspect of HVAC design, and I may get into that on my designing duct system video, but just like smart digital gauges, I still think technicians should know the how and why, once you have the knowledge you can quickly assess the duct work on a quote or repair. most of my work history is in repair/replacement, so most of my information leans that way, so often I see contractors replacing equipment and then ending up shocked that the original issue remains. lets face it, our trade is difficult, I've said it before, we need to be a sheet metal worker, plumber, electrician, computer programer, and a detective..... we need to kneel in front of a thousand furnaces before we can quickly assess whats going on. I love our job ! ( sorry for long response )
What about the pressure drop from each return and supply register? Should I subtract another 0.06" to account for the registers on the longest run?
On the friction rate worksheet you only subtract the PD from the worst case supply and return grilles. ACCA allows you to assume .03" for a supply and .03" for a return. It is recommended that if you know the model of grille being used that you use the actual pd from the performance data.
We sign up for the Nick Jr birthday 🎂🎉 club 💐😂
First off .1 is too low for most wet evap coils, you should should manufactures lit so the guys know they have to determine it, last A coil i did last week was 2.5 wet. good first vid drive home air filter pressure drops, example same job last week I installed 2 20 X 25 X 5 media filters to make the math work.
well i should say made the math work for the Air velocity i wanted for a quiet system that is very energy efficient for the blower motor,, also you need the blower performance lit from the Manufacture to do this all. hope you touch on that
@@Gutter-Snipe with most of my videos, I try to keep it very general and hope the technicians search out the exact equations for what they are working on, there are just to many variables to hit on them all, the carrier N coil, or if an A-coil is two row, three row or four, fin on tube or micro channel. as for the duct work, I mention a top take off, but the numbers change if its a square throat scottie, or a three or four piece adjustable take off. my hope is that my videos provide a starting point to inspire techs to keep learning. thanks for checking out our videos, more to come.
This the first CZcams I’ve ever seen where friction rate was explained properly 👍🏼
Where’s the follow up video?
its still in the works, I've just been busy with job site visits and trainings. please be patient, thanks for your interest.
well, I'm not sure about a follow up video, but a new duct sizing video is up, check it out !