Tender For operation and maintenance of 2x7.5 tr. capacity air cooled a.c. plant, 32000 c.f.m capacity forced ventilation system i/c window type, split type air-conditioners and operation of all vrf type ac units, annual maintenance contract of ac system at animation building, crt, audiography, film studio, small studio, editing block, academic block, bry-air dehumidifier at srfti, kolkata. (sh: annual maintenance of air conditioning system (vrf) at animation building, main theatre, preview theatre and tv floor). (m/s. blue star