What is the maximum air can be dilivered by Duct AC diffusers?

Thilak Raj B

Junior Member
Jan 24, 2019
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I have a flat slab design for my company. The total floor height is 11.5 feet (138"). Out of it, 8" is the slab thickness and the drop area (Column capital ) is 8" tick. The drop area size is 17.5'x11' (192.5 sqft). So, is it possible to run the duct only in the area where drop area is not there? What type of diffusers can be put near the drop area to throw the air to 17'/2 = 9' distance?
If I put the duct & diffusers below the drop area, then it would reduce my floor height I am getting below the ceiling. So, I want to get the maximum space below the ceiling.
I have contacted some vendors here and they do not have proper information like max air flow from a diffuser etc. Without this information, I am not able to decide whether to go for flat slab or beam slab model.

Is there any way to put the duct AC for my flat slab design?

Thanks in advance.

I have attached the flat slab plan for references.
 

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