Air-Conditioning Installation and Maintenance Contractors. Manufacture of Sheet Metal Ducting. Design and Supply of Mechanical Installations. We have undertaken work in Gauteng, North West, Free State, Natal, Northern Cape, Botswana and Malawi. We manufacture ducting and other air conditioning equipment, which may be required for our contracts. We have undertaken air conditioning contracts in excess of R3 million and our annual turnover exceeds R12 million