Dear All,

Nowadays, I am working in a Shopping Mall.The air conditioning in every showroom is provided by both AHU and Treated Fresh Air duct.The temperature of the air supplied through TFA duct is between 19-24 Degree Celsius.Generally, the amount of CFM supplied via TFA is approximately 1/3rd or 1/4th of the CFM supplied by AHU.

Now the question is, should TFA duct be bring down directly below the false ceiling or it should be left as it as above the false ceiling.Earlier, the designer and Project team were saying that there is no need of bringing TFA below the false ceiling and now they are saying that it should be drop down from the false ceiling.What will be right way ??

In mostly cases, TFA ducts are left above the false ceiling or bring down ??

As per my perspective,it should be bring down below the false ceiling.Otherwise TFA's CFM will get wasted.