notice inviting tender for design supply and installation commissioning of ductable split air conditioner units , supply of air cooled ductable split unit 11 tr ( 2 x 5 . 5 ) circuit as per technical specification . , gss rectangular ducting 22g/24 , insulating the above ducting with 13mm nitrile rubber o class , cu-pipe hard 20 swg from indoor to outdoor and size as per vendor specification . , cu-pipe hard 20 swg return from outdoor and size as per vendor specification . , indoor to outdoor cable 6c x2 . 5 sqmm copper armourd frls xlpe polycab . , 3c x 6 sqmm copper armored power cables from external starter to evaporator , compressor , condenser fan motors , fire retardant canvass connection , drain line duly insulated 32mm cpvc hard pipe , r22/r407c gas required for commissioning of three units . , stand for outdoor unit , external starter and control panel along with communication cable up to handset and cables for panel interconnections , thermal insulation , acoustic insulation , m . s . work with all accessories . , rigging of unit , dismantling & removal of old system ( 1x8 . 5 tr ) as per scope mentioned . , installation , testing and commissioning for new ductable split units ( 1x11tr ) as per scope mentioned . , buy back of old unit ( 1x8 . 5 tr ) .