invitation of tender for annual comprehensive maintenance contract for 133 nos . of air conditioners installed in the ministry of power , name of items , comprehensive annual maintenance charge of window air-conditioners ( capacity: 1 . 5 / 2 . 0 ton ) , comprehensive annual maintenance charge of split air-conditioners ( capacity: 1 . 5 / 2 . 0 ton ) , comprehensive annual maintenance charge of cassette acs , comprehensive annual maintenance charge of tower acs , besides the above , rates for following items may also be furnished : , re-installation charges of window ac . , re-installation charges of split ac . , re-installation charges of tower / cassette ac . , dismantling charges of window ac , dismantling charges of split ac , dismantling charges of tower / cassette ac , supply of iron stand for outdoor of split ac , supply of copper pipe 9in applicable sizes ) with insulation ( per meter ) , supply of drain pipe ( per meter ) , 2 . 5 mm electrical cable , 3 core pvc insulated ( per meter ) isi marked , supply of steel plug