INSTALLING A STEEL PLATFORM AND HVAC PLANT ON DUNNES STORES ROOF, WHICH INCLUDES 2 AIR HANDLING UNITS, 1 CHILLER, 2 DRY AIR COOLERS, AND LOUVERED SCREENS (TOTAL AREA C.200 SQM), REMOVING AN EXISTING T-SHAPED ROOF VENT AND ALL OTHER ASSOCIATED SITE WORKS/SERVICES