Air conditioning – Refrigeration – Heating – Extraction – Electrical Sovereign Air commenced operation in 1989 as a company to provide service, repairs and maintenance to commercial Air conditioning, refrigeration and mechanical plant on a 24 hour basis. The director, with a background in the mechanical, refrigeration and air conditioning service developed the business’s maintenance profile and built the company employing internal staff and on site personnel offering clients personalized, professional and responsive service and by developing short, medium and long term maintenance programs.