107 - How to select grilles and diffusers all type in English

[@ricz1222]

Thank you keep it up for English tutorials

[@prashanthgaitonde3451]

how did you calculate the CFM of each room. For example, in first example 4200 cfm

[@ncengineeringtechnology3376]

By heat load calculation & selection of AC unit.
I only assume this CFM, to explain selection of grill.
different types of rooms may have different CFM, as per their use and project conditions.

[@marganilasyasri4231]

Hey, where are you from??

[@ncengineeringtechnology3376]

India

[@EngAssiimweRonald]

Thanks for this rap up Engineer

[@abdulazizarkobi8611]

I have one Question at 28:00 in your calculation get 0.2x12=2.4, value of 12 for what ?

[@ncengineeringtechnology3376]

in this calculation we select grill for 50 CFM/FT.
Throw for 38 CFM/FT is 10ft.
50-38=12 CFM
we calculate throw for remaining 12 CFM after 38 by interpolation.

[@abaidurrehmanch5229]

What is refrence for this calculation

[@ncengineeringtechnology3376]

I already used manufacturers selection sheets, for selection of grill & diffusers you can follow selection criteria provided by manufacturers.

[@juliuscastillo2241]

Hi sir. Where did you get 20÷3/4=15?

[@ncengineeringtechnology3376]

Thanks, may be by mistake, 3/4 of 20 is 15.
Actually I tried to explain the concept, hope it will help you.

[@AnasHiwa-ez3dt]

😂😂😂🎉🎉د