About Us

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Constant Air Systems Limited (CAS) incorporated in February 1965 as a Heating, Ventilation and Air Conditioning Contractor.

Since the original formation it has specialised in high temperature, high velocity heating system through its wholly owned subsidiary company, Casaire Limited, who are considered one of the leading experts in this type of work. In many instances the two companies have worked in conjunction with each other to provide the client with a comprehensive design and installation for the complete development.

Constant Air Systems have successfully carried out contracts in the commercial and retail sectors as well as in the motor industry, pharmaceutical industry, printing, shipbuilding, warehouse distribution, aircraft hangar etc.

In more recent years we have expanded in to the field of acoustics with the formation of Emtec Products Limited who specialise in acoustic silencers and louvers.


Further Expansion

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In 1986 the company continued to expand with the introduction of the design and manufacture of prefabricated packaged plantrooms for the retail sector which has since expanded in to the industrial market.

The group turnover is currently of £20m and has been rising steadily through the years. Constant Air Systems still remains a private company.

In 2002 the two offices of Constant Air Systems; Harrow (retail) and High Wycombe were brought together in one location where we have traded up until recently. In the summer of 2015 Constant Air Systems moved into a modern, up to date office / fabrication facility that would house all the companies within the CAS Group.

CAS are currently celebrating being in business 50 years.