ACS CCNI 3 Day Refresher Training (3rd March 2026)

There are no formal requirements to participate in this training course.

To book or for further information, please contact 0208 544 4574 or email This email address is being protected from spambots. You need JavaScript enabled to view it.

Start dates: Cost Tuition Fee: £330 (payable in advance of course)

Please note that course fees are accurate at time of publication but may be subject to change.

Candidates are asked to bring 2 recent passport size photographs and their National Insurance Number and Gas Safe Register Card (as applicable) upon attending first day of the course.

To book or for further information, please contact 0208 544 4574 or email This email address is being protected from spambots. You need JavaScript enabled to view it.

ACS gas safety training for operatives who are preparing to take the ACS CCN1 Domestic Core Gas Safety Assessments. The training will take three days and is designed to give operatives the opportunity to update their knowledge and inform them of regulatory changes that may have occurred since they sat their last assessment. It is also suitable for those operatives who are preparing for the initial CCN1 Core Gas Safety Assessment or CCN1 Core Gas Safety Reassessment.

Day 1: Gas Safety Regulations - Unsafe Situations - Pressure Tests - Gas Rates - Combustion Analysis. Day 2: Inspection of Gas Installation Pipe Work - Tightness, Testing and Purging - Gas Safety Controls. Day 3: Pipe Sizing - Ventilation - Inspection and Testing of Open Flues and Room Sealed Flues. This course is a mixture of theoretical and practical training. Upon enrolement, operatives will investigate, discover and learn about the essential aspects associated with the safe delivery, control and use of natural gas in the domestic environment.