About Us


  • The Health Service
    (Hospitals, clinics and nursing homes)
  • Ministry of Defence
  • Rail Networks
  • Offshore
    (Oil Rigs and RN vessels)
  • Education
  • Catering Facilities
    (Cafes, hotels, restaurants and conference centres)
  • Prisons
  • Industry
  • Commerce
    (Staff canteens and rest rooms)


Calomax was founded in 1939 in Leeds and moved to its present, purpose built location in 1962.

In the intervening 70+ years our boilers have developed beyond recognition, but the core values of durability and value for money remain unchanged. Our boilers are built to last, and properly serviced and maintained should last 5 years, at the very least.

Nowadays much is said about “corporate and social responsibility” and “sustainability”. We were following these practices before the phrases were even coined – in Yorkshire we call it “being careful”. Careful about the environment and our impact upon it. Careful about the quality of our product and our reputation. Careful about the people we employ (most of whom have been with us many years), and careful that we continue to offer value for money boilers with life-cycle costs that cannot be beaten. (It will always be possible to buy “cheaper” products, but if these only last 12 months, who benefits?) Whilst "traditional" in outlook, over the years we have continued to invest in new technologies: our state-of-the-art 3D CAD software, CNC Turret Punch Press & CNC Touch-screen Tube Bender are typical examples. We are privately owned and take pride in the fact that our water boilers are all designed and manufactured in-house at our Leeds factory.