About us

SIGMA is a world leader for over 30 years in the design, manufacture, supply and service of specialised air conditioning equipment suitable for the transportation rail, mining, industrial and defence industries, where high ambient temperatures, severe vibration, dense particulate and corrosive environments prevail.

SIGMA has developed a comprehensive range of air conditioning and filtration equipment now manufactured for the transportation, industrial, mining, and defence markets on a global basis. The innovative and unique SIGMA designed equipment has attracted worldwide interest and acceptance, and many enquiries have been received from major industries throughout the world.

SIGMA is a leading global company in the development of Transport and Heavy Duty HVAC Systems for the Rail, Mining, Industrial and the demanding Defence markets.

The World of SIGMA truly covers the Globe across several market groups. The products are produced with over 30 years of broad experience in the air conditioning markets.

SIGMA provides a "whole of life" outlook for its products and provides tailored system solutions that deliver true value to our customers.

SIGMA is a Quality Assured company to ISO9001 at all its operations and has extensive Research and Development facilities to ensure SIGMA's equipment delivers maximum performance, value and reliability with minimum overall life cycle cost to our customers.

We are looking forward to hearing from you