01387 268 868 (Dumfries)
01556 503 150 (Castle Douglas)


Range of commercial boiler services including boiler installation service and repair and gas fired catering appliances installation service and repair.

Get in touch today
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Commercial Boiler Services

Commercial Boiler Services

Our commercial gas services include:

  • Commercial boiler installation service and repair
  • Commercial gas pipework installation service and repair
  • Commercial gas fired catering appliances installation service and repair
  • Commercial gas fired laundry appliances service and repair
  • Commercial warm air unit installation service and repair
  • Industrial pipework commission


"Could not ask for better, boiler on the blink and a load of visitors coming, phoned and got Michael who could not have been more helpful. Thank you to all concerned - I cannot remember the name of the engineer, but he was extremely confident and capable, and did a very neat and tidy job. I will have no hesitation in recommending this company. They are also very reasonably priced - very satisfied all round."

Boiler Repair

"It was imperative we had the work carried out immediately and within 30 hours of our problem being diagnosed we had a new boiler fitted. That was far beyond our expectations. Throughout the process we were kept well informed and every aspect of the process was thoroughly explained. All members of staff, without fail were courteous and helpful through the process. The product itself is excellent and the price was also competitive. Special thanks to Laurie Irving the very best member of staff from a Company we will be using again and would thoroughly recommend."

New Boiler

Commercial Catering

At Derek Mitchell Group, we are qualified to carry out the installation, service and repair of commercial gas fired catering equipment. From hotels and schools to restaurants and churches, we have a wide range of experience when it comes to commercial equipment installation.

We can also work on the gas pipework and Gas Solenoid / interlock systems.

Commercial Heating

Our engineers are authorised to carry out the installation, service and repair of commercial gas heating boilers and systems, providing servicing that meets the expectations of boiler manufacturers.

Commercial Boiler Installation

As well as domestic installations, our team members are certified in installing commercial boilers, which allows us to carry out:

Contact us to find out more about our commercial boiler installation services, or to arrange an appointment with one of our engineers to discuss the options available.

Commercial / Industrial Gas Pipework

At Derek Mitchell Group, we are experienced in carrying out the installation, testing and repairs of commercial and industrial pipework up to and above 1.8MW, which covers IGEM/UP/1A & 1. 

We can also carry out purging urgently of commercial properties that have been shut down due to a gas leak on the system, so get in touch with us today with your enquiry.

Commercial Water Treatment

In order to considerably reduce corrosion and provide the correct corrosion protection, we can carry out water testing of your central heating system.

We aim to complete this work to ensure minimal down time of your plant room, and we back up our work by sending sample to an accredited laboratory to confirm our results.

You will be provided with a detailed report, recommendations on how to clean your system correctly, and ongoing monitoring. 

Arrange an appointment with one of our engineers to discuss the options available.

Gas Fired Laundry

At Derek Mitchell Group, our team members are qualified to work on gas fired laundry equipment (specifically tumble dryers). We work on a vast amount of manufacturers’ appliances and have good contacts within the laundry industry, covering all brands of equipment and pipework within the laundry room.

To find out more, get in touch with us today.

Warm Air Heating

Air heaters are invaluable in the commercial sector for all ranges of clients, where the areas to be heated can be vast or in constant use.

From floor standing to high-level, air heaters come in many forms and they all have their own requirements when servicing, repairing and replacing.

Get in touch with us to find out what would work best for you.




Commercial Projects

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Lloyd Limited - Carlisle

Mechanical and electrical installation on workshop extension for Lloyd Limited.

Gracefield Arts Centre - Dumfries

Supply & installation of a new oil boiler and chemical flushing of the existing heating system pipe work.

Westlands Country Park - Annan

Full design & build of electrical and mechanical services for Westland's Country Park.


Our people make us who we are

Derek Mitchell Group is a large, multi division contractor based in Dumfries & Galloway and working across the UK.

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