Gas, Oil, Plumbing, Electrical, Renewable Energy, Solid Fuel. Training and Assessment Centre End Point Assessment Centre
 Gas, Oil, Plumbing, Electrical,Renewable Energy, Solid Fuel.Training and Assessment CentreEnd Point Assessment Centre 

Gas Diploma Foundation Course

Assessment Information


Our Domestic and Non-Domestic Diploma courses are designed for ACS Category 2 and 3 candidates wanting to enter the gas industry.




Category 2 trainees will hold a recognised qualification in the mechanical services engineering sector (e.g. plumbing) but lack gas training and experience, while Category 3 applicants are new to the gas industry and will need more intense training.


Further Information

Assessments normally consist of a combination of practical and theory examinations.

The course requires 40 days in our training centre, plus ‘on the job’ training with candidates providing work-based evidence under the supervision of a Gas Safe registered installer.

The course normaly takes place Tuesday and Thursday evenings 6pm to 9pm, so takes 20 weeks 

Your Gas Diploma Certificate will allow you to undertake the ACS gas assessments, providing entry at category 2.


Expiry Information    No expiry date is applied. (But there is an expiry for the ACS gas assessments which is five years).


Useful Information


On completion of the training, portfolio and successful recommendation, candidates are issued with a Cert-ain Gas Foundation certificate.
Upon receipt of the Gas Diploma certificate candidates can then apply to undertake the relevant ACS assessments, which can be done at our training centre.


Training Materials


The Gas Diploma Candidate Portfolio which is issued on the first day of the course, allows candidates to record all the training they undertake as evidence of the necessary knowledge and experience to undertake the ACS assessments.

Also it is recommended that you obtain the Domestic gas safety Manual 


Course Duration 20 Weeks


Scheme Rules
Cert-ain gas diploma scheme rules.pdf
Adobe Acrobat document [222.6 KB]
Training Specification
Cert-ain domestic training specification[...]
Adobe Acrobat document [223.1 KB]
Gas Diploma
For new entrants for the gas industry. 
The courses include both practical and theory training. Candidates will be required to gain evidence of on-site gas work experience under the supervision of a Gas Safe registered engineer.

On successful completion, candidates shall be eligible to undertake the relevant ACS assessments.  

Cert-ain Certification Ltd and Oxford Energy Academy, has achieved IGEM recognition against the new gas industry training standard
IGEM/IG/1 for the following Gas Diploma qualifications: Domestic; Emergency Service Provider/Metering; 
Commercial Heating; Commercial Catering and Commercial Laundry.

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