bids are invited for room at telephone bhawan bbsr supply of 3tr copper coil evaporator and copper coil condenser ductable ac units , installation testing and commissioning of 3 tr ductable air conditioning units , supplying and laying of copper refrigerant pipes for 3 tr ductable ac units , extra for supply and charging of additional refrigerant gas , providing indoor and outdoor unit mounting bracket system , supplying and laying of 2.5sq.mm 4 core pvc or xlpe insulated and pvc sheathed copper conductor unarmoured cable , supplying and installing 300 mm width x 50 mm depth x 1.6 mm thickness size perforated painted with powder coating m.s. cable trays , providing and laying of 40mm dia fire retardant corrosion free medium class u pvc pipe along with accessories , providing and laying of 32mm dia fire retardant corrosion free medium class u pvc pipe along with accessories , providing and laying of 25mm dia fire retardant corrosion free medium class u pvc pipe along with accessories , supply fabrication and installation of 22 swg gi sheet plenum duct complete with all accessories , supply and fixing of rectangular fire retardant canvas duct connector having fabric section vinyl coated woven nylon or polyester blend material , supplying and fixing of powder coated extruded aluminium supply air grills with fixed front louvers sitc of 3x3tr ductable ac with ms brackets for id and od , split air conditioner including green ac, wall mount type total quantity : 81