Bryn Lane, Wrexham. LL13 9UT
Bryn Lane, Wrexham. LL13 9UT
This ACS course is for experienced commercial gas engineers looking to transition into domestic work. Covers Core Domestic Gas Safety (CCN1) through a recognised changeover route. Includes refresher training and assessment.
The COCDN1 Commercial to Domestic Gas Changeover course at Vulcana Training is designed for qualified commercial gas engineers who wish to expand their scope to include domestic gas installations. This changeover route leads to certification in Core Domestic Gas Safety (CCN1), which is a legal requirement for working on domestic appliances.
By completing this course, engineers with a commercial background gain the knowledge and certification necessary to work on domestic systems, meeting Gas Safe requirements and broadening their work opportunities.
Refresher training is included as part of the course, ensuring all candidates are fully prepared for the assessments.
COCDN1 – Changeover to Domestic Core Gas Safety (CCN1)
This module includes:
Domestic gas safety legislation and responsibilities
Installation standards and pipework sizing
Ventilation, flueing, and combustion analysis
Identifying and dealing with unsafe situations
Tightness testing and purging in domestic settings
Both theory and practical assessments are carried out as part of this course, following an initial refresher period.
After completing your changeover to domestic work, you can also choose to add domestic appliance assessments to expand your scope further:
CENWAT – Boilers and water heaters
CKR1 – Domestic cookers
HTR1 – Gas fires and space heaters
DAH1 – Warm air heating
MET1 – Meters
These modules can be booked alongside COCDN1 and assessed within the same visit if required.
This course is only available to candidates who:
Hold current in-date commercial gas qualifications (e.g. COCN1 or equivalent), and
Have relevant commercial gas experience
Have been registered with Gas Safe for a minimum of 12 months in the commercial category
You must provide evidence of your qualifications and Gas Safe registration at the time of booking.
This course leads to domestic CCN1 certification via the changeover route and is treated as an initial assessment.
COCDN1 is not available as a reassessment. Once you have completed this changeover and hold a valid CCN1 certificate, any future renewals will be completed via the standard CCN1 reassessment route, not through the commercial to domestic changeover process.
All our courses include refresher training and are delivered in a supportive setting to help you feel confident and well-prepared for assessment.
Yes, training manuals and certificates are included in the course fees, except for OFTEC reassessment course training material, where are charged separately.
Any required study materials will be provided on the first day of your course. However, if you prefer to collect them in advance, you can do so by making prior arrangements with us.
With a 99.9% pass rate, it’s unlikely—but if you don’t pass, we’ll discuss your options, including reassessment and additional training if needed.
Yes, we offer refresher training to help candidates prepare for reassessments. Contact us to discuss available options.
We offer various payment options, including installment plans for selected courses. Please contact us to discuss available payment plans.
You can book online using the “Book Now” button on our website, email us at office@vulcana.co.uk, or call 01978 660300. If you don’t see the course you need on our booking system, please contact us, as we may still be running it.
You will need to bring:
Our training centre is located at:
Bryn Lane, Wrexham Industrial Estate, LL13 9UT
We are opposite the petrol station.
Certificates are sent directly to your home address once they have been processed by the awarding body. Processing times can vary, so please allow some time for delivery.
For full details on cancellations and refunds, please refer to our cancellation policy or contact us directly.
