At C.S. Boxall, we understand the importance of having hot water and warmth throughout all buildings, including commercial outlets such as offices, retail shops, warehouses, hotels and factories. We also operate in official and government buildings such as schools, churches, aircraft hangers, clinics, surgeries and hospitals.


Our expert and experienced team have the skillset to take on large and small tasks to suit your requirements and timeframe. As an accredited installer of Worcester Bosch Group, a member of OFTEC (the Oil Firing Technical Association), and Gas Safe registered, we take great care and attention to each project.


Our specialism in commercial services lies in these particular areas:

Installation and Servicing of Commercial Boilers

Using leading manufacturers of the highest quality, our dedicated team will install and service your commercial boiler at a time that suits you best. Working in Cardiff, Swansea, Newport and wider areas, we have a comprehensive knowledge of the location and what solution is best for you.

When installing either condensing conventional gas boilers or condensing combination boilers, both options come with a warranty to give you the ultimate peace of mind.

Installation of Radiant Tube Heaters, Warm Air Heaters and Cabinet Heaters

Specialist know-how is required for all heating works due to the technical nature of commercial buildings and the necessity to have them installed for a variety of reasons.

Our fully-insured team will be able to supply and fit all items to your requirements to achieve optimum results and keep your workforce warm.

Strength and Gas Tightness Testing

It’s important to have regular gas strength and tightness tests to ensure that a gas installation is safe. The business owner is responsible for all gas items on the premises being safe to use.

At C.S. Boxall we carry out the tests in a safe and timely manner, where our engineers will take a look at all relevant items to check that they are not hazardous to those in the building. Using a gas detector, we’ll look at any issues whilst monitoring the gas pressure at different levels and provide a full report of our findings.

Pipework Purging

A critical step when determining the success of welding stainless steel, corrosion metals or titanium, pipework purging is the act of drawing out any potentially dangerous gas or a vessel from the pipe and then replacing it with another gas or liquid.

Our engineers achieve this by injecting the substance in a controlled environment that won’t cause any harm.

Why Choose CS Boxall?

Our years of experience working with commercial clients in the area make C.S. Boxall a leading choice for commercial services. Whether you’re looking for a full installation, service, or repair, our expert team are on hand to help.

Contact us today Book Your Boiler Installation

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24/7 Emergency Plumbing/Heating Emergency Callouts

Call us on
07590 350 650
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.