PROVIDER WITH A CIDB GRADING OF 1ME OR HIGHER FOR THE SUPPLY AND INSTALLATION OF NEW SPLIT AIR CONDITIONING UNITS, RETROFITTING OF ANEW HIDEAWAY HVAC UNIT INTO THE EXISTING DUCTING SYSTEM, AND RELOCATION OF DUCTING AND DIFFUSERS TO IMPROVE AIRFLOW IN AN OPEN-PLAN OFFICE AT THE NATIONAL RESEARCH FOUNDATION PREMISES, PRETORIA (BRUMMERIA)