bids are invited for duct ac unms server room diffusers , ms color dampers , itc of ac units including nitrogen pressure testing vaccumisation of the units initial refrigerant charge along with lifting and shifting of machines and other ancillary works , ms angle work for out door units , ms angle work for indoor units duct supports etc , timer for each machine , thermal insulation with 13 mm closed cell nitrile rubber , accoustic insulation with 10 mm thick open cell nitrile rubber , comprehensive amc charges for ducted ac units after completion of warranty first year , comprehensive amc charges for ducted ac unitsafter completion of warranty second year , comprehensive amc charges for ducted ac units after completion of warranty third year , comprehensive amc charges for ducted ac units after completion of warranty fourth year , comprehensive amc charges for ducted ac units after completion of warranty fifth year , ac duct mountable air decontamination system total quantity : 77