400 cfm is design velocity area is sq.ft divide by velocity in fpm we got area in sq.ft. Then he mulitply by 144 to convert sq.ft to sw.in and taken its square root to get grill size.
Greetings Engineer. I am interested in this methos of calculating the air terminal sizes. But this may not work with the duct sizes calculated using equal friction method right?
@@MEPEngineeringTutorials Nice Video Sir, but can you please explain whether 400 is FPM or CFM. Because if you Divide 199 CFM/400 CFM then you get an answer which doesn't not have any unit. But after dividing 199/400 we are getting area in ft2 and by dividing it with 144 we are getting area in sq. inches. And lastly by using sq.root function we get the diffuser size in inches. Q (CFM) = A (Ft.) x V (FPM). Please correct me if I am wrong.
Louver size will be same as your duct size. For example if your fresh air duct size is 400x250 then sand trap louver size will be same as fresh air duct i-e 400x250 ... Similarly if your exhaust duct size is 300x200 then then your exhaust louver size will be same as exhaust duct i-e 300x200
Sir i want to join your channel I just wanted to know which subscription should i choose to get knowledge or for learning purpose on which membership will answer me personally or either do you provide online class so that I take classes I will pay whatever they charge u charge
@@MEPEngineeringTutorials sir unable to receive your email don't know why u can whatsapp me on my no. Which is +91-9719666183 Waiting ur kind response ASAP.
I am not getting your method. First show the formula,then you can calculate. As per my knowledge for better sound performance maximum allowed terminal velocity is 500FPM So as per that we can size the neck for diffuser or grill. Velocity(in FPM) x standard neck size (in feet square). should give you the maximum allowed CFM through that grill or diffuser. Kindly clarify
As u mentioned, airflow cfm = Vel fpm x Area ft² So Ft²= cfm/fpm He considers 400fpm as per standard (considering allowed noise level) So Inch²= cfm/400*144 (1ft=12in) Then taking square root gives one side of diffuser
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400 cfm is design velocity area is sq.ft divide by velocity in fpm we got area in sq.ft. Then he mulitply by 144 to convert sq.ft to sw.in and taken its square root to get grill size.
Nice videos and if possible please do the video on Supply air grills calculation and selection
simple and easy to understand the content
where did you get the 400 and 144?
Hi bro can you explain the throw in meter, how to consider for x direction and y direction. Because there is only one throw.
Sir grill hum kaha use krte hai
Hi bro... Ur video is very great....
Thank you very much,For your efforts.✍🏻🇦🇪
How about the throw distance? Isn't that necessary?
Hi brother thanks for this video....Can you please rectify is the calculated size is diffuser neck size or it's a face size?
can someone explain the formula? where does the numbers come from? (CFM/400*144)^(1/2)...
good job brother
how can i register myself for revit software or autocad mep?
Greetings Engineer.
I am interested in this methos of calculating the air terminal sizes. But this may not work with the duct sizes calculated using equal friction method right?
Nice video keep going on.......
Plz explain what is 400 & 144
Velocity 400 fpm , 144 from ft2 to inch 2
1:20 can you pls explain this what actual steps are thanks
still not got the answer
Nice bro...Very useful
Sir please explain find grill size fourmula.
How to use that Elbow in AutoCAD drawing
I have one doubt... I shall contact with u
You can contact on mentioned email address in the video description
Thanks for this video
Sir how we are getting 144....i think 400is fpm
144 is used as conversion factor from ft2 to inch2 and 400 is used because as per thumb rule we take 1TR = 400 CFM
@@MEPEngineeringTutorials Nice Video Sir, but can you please explain whether 400 is FPM or CFM. Because if you Divide 199 CFM/400 CFM then you get an answer which doesn't not have any unit.
But after dividing 199/400 we are getting area in ft2 and by dividing it with 144 we are getting area in sq. inches. And lastly by using sq.root function we get the diffuser size in inches.
Q (CFM) = A (Ft.) x V (FPM).
Please correct me if I am wrong.
Sorry I wrote dividing by 144. I mean to say multiplying by 144.
Brother how to size Louvre?
Louver size will be same as your duct size. For example if your fresh air duct size is 400x250 then sand trap louver size will be same as fresh air duct i-e 400x250 ... Similarly if your exhaust duct size is 300x200 then then your exhaust louver size will be same as exhaust duct i-e 300x200
@@MEPEngineeringTutorials Thank you brother 😊❤️
Sir i want to join your channel
I just wanted to know which subscription should i choose to get knowledge or for learning purpose on which membership will answer me personally or either do you provide online class so that I take classes I will pay whatever they charge u charge
Dear Naushad for online training class you can contact me on syedmuhammadw@gmail.com
Dear
Brother and Sir
I sent my query on your given mail address kindly revert ASAP
mail :- naushadahmed78697@gmail.com
Naushad your email has some problem, your quota is full. I already sent you an email yesterday
@@MEPEngineeringTutorials sir unable to receive your email don't know why u can whatsapp me on my no. Which is +91-9719666183
Waiting ur kind response ASAP.
Sir I need dwg file
Thanks
What is 400 and 144
can u plz tell formula with full detail
I am not getting your method. First show the formula,then you can calculate.
As per my knowledge for better sound performance maximum allowed terminal velocity is 500FPM
So as per that we can size the neck for diffuser or grill.
Velocity(in FPM) x standard neck size (in feet square). should give you the maximum allowed CFM through that grill or diffuser.
Kindly clarify
As u mentioned, airflow cfm = Vel fpm x Area ft²
So
Ft²= cfm/fpm
He considers 400fpm as per standard (considering allowed noise level)
So Inch²= cfm/400*144
(1ft=12in)
Then taking square root gives one side of diffuser
Plz, we want project file ?
You have to join channel membership to get access to this file. Channel membership link is given in the video description
@@MEPEngineeringTutorials ok I will right now plz send me this file
Why u multiply with 144?
from ft2 to inc2
Good but video quality need to improve
please tell me how to calculate returned air grill
Why you divided by 400
👍🏿
Hello sir
Loud plz
I know there was a problem while recording this video I apologize for the turbulence.