supply of ac duct for computer lab , purchase of ac duct for computer lab ( supply of inverter type ceiling suspended ductable split ac units of specified capacities, nominal capacity condensing unit with all standard fittings, safety devices, like hp / lp cutout, single phase preventor, overload relays, r410a gas, vibration isolation pads etc. sutitable to work till 52 deg ambient, blue fin condensor and corrossion resistant body, wide voltage range 360v -440v, refrigerant cooled pcb, longer piping up to 60 meters ) , 11 tr, dsai- 1321r3 , 8 tr, dsai -961r3 , purchase of low side ( machines ) ( installation, testing and commisioning of inverter type ceiling suspended ductable split ac units of specified capacities, nominal capacity condensing unit with all standard fittings, safety devices, like hp / lp cutout, single phase preventor, overload relays, r-410a gas, vibration isolation pads etc. suitable to work till 52 deg ambient, blue fin condensor and corrosion resistant body, wide voltage range 360v - 440 v, refrigerant cooled pcb, longer piping up to 60 meters ) , 11 tr, dsai- 1321r3 , 8 tr, dsai -961r3 , refrigerant piping with necessary clamping , control cabling b / w indoor & outdoor units , refrigerant gas- r410a , power cabling from isolator to outdoor unit , sitc of hard pvc drain piping. drain piping with tubular nitrile rubber insulation: complete in all respects. well clamped till drain points - for all units , ducting , 0.63mm ( 24 gauge ) , 0.80 mm ( 22 gauge ) , duct insulation & lining , supply and installation of acoustic insulation of ducts using 9mm open cell nitrile rubber, well adhesived, 150-180 kg / cm2 , supply, installation and testing of thermal insulation of ducts using 9mm closed cell nitrile rubber, well adhesived, 40-60 kg / cm2 , canvas connection , air distribution products , supply and fixing of powder coated aluminium grills / diffusers ( supply / return ) , other charges if any , amc if any