Constant Air Systems

Design, specification, site installation and commissioning of mechanical services projects.

Plant Rooms

Constant Air Systems have been designing and manufacturing off site prefabricated packaged plantrooms and skid solutions for over 30 years.


From either fully specified to design construct – CAS have experience of projects up to £3 Million.

Welcome to our website

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

With over 54 years of trading we have a great deal of experience we can offer to end users especially when we take on role of principal contractor.

Expansion in 1986 – during this time the company expanded with the introduction of off-site prefabricated packaged plantrooms.

The group turnover in the region of £20Million & still today remains a privately owned company.

Our Accreditations

Contact us

Unit L, Turnpike Way,
Cressex Business Park, High Wycombe, Buckinghamshire, HP12 3TF

01494 469 529

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