annual comprehensive maintenance & servicing of split / window / ductable / tower type ac machines installed atdifferent places like courts, honble judges chamber, bar association room, study room, vc room, library and other different offices / places at ground, 1st & 2nd floor of main building of honble high court , kolkata- annual comprehensive servicing & preventive maintenance of 11 tr ductable split air conditioner machine as per attached terms & conditions. 2 annual comprehensive servicing & preventive maintenance of 8.5 tr ductable split air conditioner machine as per attached terms & conditions. 3 annual comprehensive servicing & preventive maintenance of 5.5 tr ductable split air conditioner machine as per attached terms & conditions. 4 annual comprehensive servicing & preventive maintenance of 3.0 tr mega split air conditioner machine as per attached terms & conditions. 5 annual comprehensive servicing & preventive maintenance of 1.0 / 1.1 tr split type air conditioner machine as per attached terms & conditions. 6 annual comprehensive servicing & preventive maintenance of 1.5 / 1.6 / 1.8 tr split type air conditioner machine as per attached terms & conditions. 7 annual comprehensive servicing & preventive maintenance of 2.0 / 2.2 tr split / tower type air conditioner machine as per attached terms & conditions. 8 annual comprehensive servicing & preventive maintenance of 1.5 tr window typeair conditioner machine as per attached terms & conditions. 9 charges for providing 1 ( one ) no. ac mechanic ( skilled labour ) in 1 shift per day on all working days ( from 10 a.m to 6 p.m ) and as & when required ( including saturday, sunday & holidays ) in respect of proper maintenance of the afore-said ac machines & performing other duties as per attached terms & conditions. 10 charges for providing 1 ( one ) no. helper ( unskilled labour ) in 1 shift per day on all working days ( from 10 a.m to 6 p.m ) and as & when required ( including saturday, sunday & holidays ) in respect of proper maintenance of the afore-said ac machines & performing other duties as per attached terms & conditions.