bids are invited for repair, maintenance, and installation of plant/ systems/equipments (version 2) - bsnl ed bgl nit no03 sitc of turbo ventilator system for standalone bts stations container under ed bgba phase1; turbo air ventilator; service provider - supply installation testing and commissioning of 24 dia wind operated turbo air ventilator suitable for installation on bts container side wall including making necessary opening on side wall panel of bts container, cutting, drilling, making water proof sealing arrangement etc complete as per the following specification as required. , providing of suitable ms/gi boxing /frame work /duct for mounting of turbo ventilator of size 600mm x 600mm made out of sheet minimum thickness 1.22 mm (18swg) including suitable supports, fasteners making water leak proof sealing arrangement etc complete as required. note :- refer atc p.no.26 for more details , supplying & fixing of 1 x 1 square safety mesh of size 600mm x 600mm with frame of suitable gi bolts , nuts washers complete as required.note :- atc p.no.26 for more details , providing and fixing fresh air inlet arrangement of nominal size 1mtr x 0.7 mtr (preferably on opposite walls of shelter) with z type ppg/ppgl louvers to prevent rain water sepage and suiatable size gi wire mesh inside the shelter, including making suitable modification in the existing opening (after disconnectiong and removing the existing wt/ space maker ac units if available) making new opening to suit the above louvers including fixing with suitable rivets, providing water leak proof sealing arrangement etc., complete as required.