C S Boxall are a large and well-established company serving South Wales and the South West and can offer your business the professional and reliable service that you require for any aspect of commercial heating installation. We offer the full package of services, supplying, installing, maintaining, and servicing condensing conventional gas boilers and condensing combination boilers. We can offer a wide range of gas central heating systems to fit your business size and needs, and as accredited installers for Worcester Bosch we provide a 5-year warranty on all Worcester Bosch installations.


CS Boxall has been providing commercial maintenance services and has grown to be a trusted company in South Wales. We have always aimed at lowering energy bills while carrying out the job effectively and with high standards of workmanship. We also value a strong work ethic with our customers. This is why we are assessed by Corgi and Gas Safe let alone being members of Trustmark Installers who qualify commercial services & certification by technical abilities and audit them using proper working practices as endorsed by the government. We are also fully insured to ensure you have a money back guarantee in case our quality of work does not meet your standards.

24 hour emergency service

We also provide a 24-hour emergency commercial heating service that is aligned to gas safety consultancy, repairs and maintenance, project management and risk assessments. As such, our services are also tailored to fit cover designs and installations. All our services & certification engineers are Accredited Certification Scheme (ACS) accredited and fully adhere to The Gas Safety Regulations 1998. Our supervisors are members of The Institution of Gas Engineers and Managers (IGEM), and our technicians possess Registered Heating Professional (RHP) and Registered Plumber (RP) under the Chartered Institute of Plumbing and Heating Engineering (CIPHE).

This shows you that our personnel are well equipped with practical knowledge and experience in the industry and strive to keep an up-to-date professional policy. This is why we provide high levels of training to ensure they maintain continued professional development.

Call 07590 350 650

24/7 For plumbing emergencies


C S Boxall has all the necessary expertise to repair any commercial heating problems or malfunctions. Your business needs reliable contractors with the ability to respond quickly when problems occur, you’ll find our emergency call out service gives you peace of mind and the knowledge that essential heating repairs will be conducted by professional engineers with vast experience in servicing and repairing central heating boilers and appliances from all major manufacturers.

Why Choose C S Boxall for Commercial Heating Repairs?

If your commercial heating breaks down, emergency call out service is available 24/7, every day of the year. The speedy response and efficient repairs we provide will ensure your workforce remains warm, no matter what the external weather conditions. Our plumbers and engineers hold a wide range of industry accreditations and professional memberships, so you can be fully assured your commercial heating repairs are carried out by qualified and time-served technicians. In many cases, boilers and appliances only need expert repairs to continue giving years of consistent service within business premises. If our engineers have any concerns about the quality or expected life of your heating system they will advise you direct when they visit your site.

You can opt for one of our regular, annual maintenance and service plans to ensure your workplace heating remains in tip top condition throughout the coldest periods if you prefer. Annual servicing helps ensure smooth running of heating systems and gives added confidence that breakdowns will not occur at inopportune moments.

Our services to businesses in South Wales include:

  • repair and maintenance of condensing gas boilers
  • supply and maintenance of oil tanks
  • maintenance contracts for heating systems
  • services to gas and LPG appliances
  • oil or solid fuel boiler servicing

If your heating system becomes inefficient and repairs are needed on a more frequent basis, it may be more cost effective to fit a new system. We’re happy to provide details of the most popular commercial heating systems on the market and our plumbing, electrical and heating systems are fully guaranteed.

Fully qualified

and experienced team


For a single tap system, a condensing combination gas boiler provides hot water as you need it and as much or as little as you require, meaning that you don’t pay to heat water that won’t be used. The lack of necessity for a cylinder means these boilers are smaller than other alternatives making them ideal to fit in an area where space is at a premium. Condensing combination boilers depend on the mains pressure which does mean that they tend to have slower flow rates.

For businesses who may prefer to use LPG , we supply, install, maintain and service all types of LPG boilers.

In addition to commercial heating installation, C S Boxall can offer:

  • Rainwater harvesting
  • Radiators
  • Oil tanks
  • Pipe work
  • All types of boilers
  • Link up systems for gas, oil and solid-fuel
  • Underfloor heating systems
  • Renewable energy systems
  • All types of central heating systems
  • All types of burners and stoves
  • All electrical installations

We offer finance

on boilers and heating systems

Find out more about finance