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

Carbon Monoxide/ Dioxide Atmosphere and Appliance Testing  (CMDDA1)



This assessment is designed to test the competence of an gas operative in determining ambient levels of CO and presence of CO2 in dwellings and identifying the cause of fumes using a portable electronic combustion analyser. This will typically be any engineer who responds to the genuine report of a CO alarm being activated or a report of fumes.

The scope of the assessment covers Type A, B & C domestic gas appliances fitted in dwellings and follows the guidance and procedures outlined in BS EN 7967 Part 1 to 4. 



The candidate will be assessed in the following areas:-

  • Carrying out AmbientCO, CO2 testing and combustion performance analysis using electronic portable gas analysers on domestic gas appliances in dwellings following:
  • indication of fumes
  • smells
  • spillage or leakage of combustion products
  • CO detector activation
  • Interpretation of results and responses from householder or other party



CCN1/CCLP1 + CPA1) or CCN1/CCLP1 or LPG Equivalent NVQ or QCF qualification + appropriate domestic appliance(s)



Course Duration


CMDDA1  comprises of 1 days training and assessment



Written assessment paper and Practical assessment


  • You will need to bring with you

  • Candidate name and address
  • Candidate National Insurance number
  • 2 passport sized photographs
  • Copies of relevant qualifications and/or evidence of gas work experience
  • A declaration of the category for the individual making the application
  • First-time applicants will also be required to provide an acceptable  form of photographic identification e.g. a passport or driving licence

Oxford Energy Academy Ltd

Avenue One

Station Lane



OX28 4XZ


Tel: 01993 771155

email: or



Reception hours

A team member will be available to talk to you from

8.30am to 5.00pm        Mon to Fri.                    


You can also use our Contact Form.



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