supply installation and commissioning of 4 numbers of ceiling suspended ductable 5.5 tr air conditioner system for gp , supply ofair-cooled ceiling suspended ductable ac units 5.5 tr capacity , sheet metal work , supply, fabrication and fixing of galvanised sheet (gi) ducting (24 g) , acoustic insulation of duct plenum with 10mm open cell nytrel sheet , thermal insulation with 13 mm thick nitrile rubber , canvas connection , supply fixing of supply air grill/diffuser , return air grill , machine installation works , refrigerant copper piping for 5.5 tr ducted ac , interconnecting copper cable for 5.5 tr ducted ac , pvc drain piping for 5.5 tr ducted ac with 6mm insulation , gas charging (r410/r32), n2 flushing, vacuuming for 5.5 tr ducted ac , supply and fixing of odu stand for 5.5 tr ducted ac , minor civil false ceiling trapdoor