Home Page – C.A.S – Constant Air Systems – Plantrooms – Mechanical Services

Welcome to Constant Air Systems

Check out some of the services that we provide...

Check Out Our Blog

See our work in action. Case studies with downloadable technical PDF's...

Prefabricated Packages

Packages to meet any need with our prefabricated package solutions...

Career Opportunities

Our team is growing – and we’d love to hear from you if you share our passion...

We are a 1965 established privately owned company based in High Wycombe, Buckinghamshire offering HVAC Building Services solutions such as:-


  • Design
  • Contracting
  • Heating
  • Ventilation
  • Retail Mechanical Services
  • Industrial Mechanical Services
  • Prefabricated Packaged Plantrooms
  • Principal Contractor Services
  • Boiler, Steam, Chilled/Hot Water, Air Handling, Refrigeration, Electrical Switchgear Plantrooms
  • Enclosures & Control Panels