supply and installation of ac machine at the 96b and 96c, department of physics, 3rd floor, palit building, rajabazar science college, cu, kolkata-9 , supply , installation & commissioning of voltas/ carrier / daikin or equivalent machine 1.5 ton 3 star inverter 100% cu split ac machine including necessary cu insulation pipe & pvc drain pipe as per site condition (approved by the eic) , supply , installation & commissioning of voltas/ carrier / daikin or equivalent machine 2 ton 3 star inverter 100% cu split ac machine including necessary cu insulation pipe & pvc drain pipe as per site condition (approved by the eic) , less: buy back of oldsplit ac machine & window ac machine: i) split ac machine --- 1nos. ii) window ac machine -----3 nos.