As one of the largest heating and plumbing companies , covering South Wales and the South Wales, C S Boxall supplies, installs, maintains and services both condensing conventional gas boilers and condensing combination boilers. We offer a wide range of gas central heating systems to suit all homes and budgets and are Worcester Bosch accredited installers, which enables us to provide a 5-year warranty on all Worcester Bosch installations. We also provide options to extend your warranty to up to 12 years.

Central Heating Maintenance And Servicing

Annual appliance and boiler servicing are one of the most important jobs we do for our customers to ensure everything is in safe working order. Our central heating and boiler services include:

  • Gas and LPG appliance servicing
  • Gas and LPG boiler servicing
  • Oil and solid fuel appliance servicing
  • Oil and solid fuel boiler servicing
  • Landlord Safety Checks

Worcester Accredited Installer

Complete peace of mind

C S Boxall is a family-run business, which has been providing expert plumbing, heating and electrical services to the domestic, commercial and trade sectors throughout South Wales and the South Wales since 1990.

C S Boxall also has a wide range of industry accreditations and memberships, so you can be confident we have the expertise you’re looking for, including; Gas Safe, Joint Industry Board for Plumbing, Hetas, Worcester Bosch Accredited Installer, registered aga cooker/Rayburn Guild engineer and registered Oftec technician.

We install boilers for domestic and commercial clients across South Wales. Some of the areas that our heating engineers frequently cover include:

• Swansea
• Cardiff
• Vale of Glamorgan
• Bridgend
• Newport
• Penarth
• Porthcawl
• Port Talbot
• Caerphilly


Frequently Asked Questions



How often should central heating systems be serviced?

A central heating system should be serviced at a minimum of once every year to remain efficient, safe, and reliable.


How to service a central heating system?

Servicing central heating deals with the checking of the boiler, bleeding the radiators, inspection, and cleaning of components but above all, the guarantee that the system operates correctly. Professional servicing is advisable.


What does a comprehensive central heating service include?

A full service includes a boiler inspection, cleaning the heat exchanger, checking the flue, assessing for leakage, ensuring the control and safety devices are in working order, and, most importantly, checking that the correct pressure level is maintained. Get in touch with C.S. Boxall for the fullest possible service.


How can regular servicing extend the lifespan of your central heating system?

Routine servicing allows for minor issues to be detected and fixed before they become grave, ensures maximum working of the system and reduces wear and tear, therefore improving its sturdiness.


What are the warning signs that your central heating system needs servicing?

With symptoms such as strange noises, irregular heating, frequent boiler shutdowns and increased energy bills, these warning signs typically let you know something may be wrong. If these calls are checked quickly, personalised attention is just a call to C.S. Boxall away.


Contact us today Book Your Boiler Installation

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Our testimonials

What our clients are saying

First time using CS Boxall. When I phoned, the office staff were so friendly and ready to help. They got me booked in quickly. When the engineer attend he was very polite and helpful and sorted the problem out. Would definitely recommend, a fabulous service.

Donna Thomas

Excellent company, I always have them for the annual boiler service which is very reasonable but more importantly they always assist with a problem. No hot water or heating last night, I left a voicemail and the engineer called at 8.15am and arrived at 10am, fault found and fixed. A big thanks to Alan for this and the office staff for sorting, would highly recommend CS Boxall

Heather J

Amazing service, fixed my broken washing machine pipe in no time and I got an apportionment straight away too. Will Definitely use again.

Hayley Smith

I must say that your boys and your team were absolutely fantastic in the quality of work, the organisation of trades were to super professional level.

You must be really proud.

Paul Smith

I would like to say thank you for the recent shower works carried out. We are so pleased. All aspects of the work were dealt with so professionally and at all times staff were so accommodating regarding dates /times etc.

Rhys was particularly helpful. Would highly recommend your company.

Amanda Drew

I would just like to send a huge message of thanks to your engineer who sorted out our Rayburn boiler/timer problem last Tuesday. Please tell him it’s working perfectly now and convey our gratitude to him for his perseverance .

Thanks to your company too for its excellent standards of workmanship and professionalism. We have used you for a while now and have been very impressed with your high levels of service.

Sally Moran

Just wanted to thank you for the fantastic work that was done in our house. Both men were extremely polite and hardworking and did a brilliant job. We are also very grateful for you coming out much earlier in order for us to have heating again.

Excellent Service. Thank you so much.

Sarah Harper

I just want to pass on my thanks and appreciation for the work that you have recently provided help to get our boiler / heating back up and running in the hospice.

I'm sure that you're very busy but i really value how responsive you've been to help us.

We're really grateful to be working with you and I'm sure it's the start of a successful partnership.


I would like to say a huge thank you to the lady who took my call yesterday and managed to get someone to us in minutes. To say yesterday was stress would be an understatement. The plumber that arrived was so calm and collected and I just wanted to thank the company so much and apologise for my highly emotional state. No one ever expects to open their front door and be faced with that and especially so close to Christmas... on the day you are due to exchange on the house!

Thanks again and we will be recommending you to everyone!!!

Beca Griffiths

Can I please also pay a compliment to David for his outstanding work yesterday and thank you all for getting the heating working much sooner than I'd anticipated.

Jon Taylor

I wanted to say once again how helpful the two men were. They answered all my questions and were just very considerate.

I have been so pleased with your company and would highly recommend you.

Clare Hockings

I would like to thank you for the installation job last Thursday. Your men did a great job. Mine is not an easy property to work on or in and they were efficient and professional and very prompt in their timing of the work in spite of all.

They also did go above and beyond with details and did not treat me like a lamebrain civilian which made a change.

Judith Browne
Our credentials

We’re accredited

To ensure our customers receive a high standard of workmanship, experience is accredited and monitored by several trade industry bodies.