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.

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Commercial Boiler Services

Commercial Boiler Services

Our commercial gas services include:

  • Commercial boiler installation
  • Commercial gas pipework installation
  • Commercial warm air unit installation
  • Industrial pipework commission


"This was our second boiler service from D.Mitchell Ltd-It was easy to arrange the appointment via the telephone at a convenient date and time. It was carried out neatly and professionally by Laurie. He protected the floor area with coverings prior to beginning and there was no mess afterwards. Social distance was maintained at all times."

Annual Service to Caravan Gas Boiler

"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 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 of 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.

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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Westlands Country Park - Annan

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

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.


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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