Existing HVAC system that is roof CCR Control Room of the Satun central possessing platform. Which operative for a long time, Corrosive of the sea. ACCU and AHU cooling lower Efficiency and have Switchgear room addition So increased cooling load.We recommended a new HVAC system to the install outside roof CCR Control Room. (In Cloud mark). South side with Package air conditioning cooling capacity 50 ton x 2 ea .
About duct work recommend use existing duct for SA , RA , FA in main branch but,duct work install outside to package air conditioning have make new duct.