CCN1 is required for any operative wishing to work on domestic gas installations and appliances. In addition, the operative must also hold the relevant appliance element relating to the work they wish to undertake.

Initial Core Domestic Gas Safety (CCN1) training and assessment covers:

• Gas safety regulations and other relevant legislation
  
• Combustion, relevant pressures and gas rates
  
• Gas pipe work
  
• Tightness testing and purging, including low and medium pressure
  
• Chimney systems recognition and testing
  
• Ventilation
  
• Gas controls
  
  Initial appliances training covers:
  
• Installation
  
• Commissioning
  
• Servicing and maintenance
  
• Basic gas safety fault finding
  
  Assessment is carried out using a variety of assessment methods including multiple choice, short written response and scenario questions and observed practical assessment.
  
  The appliance assessments the college can provide are;
  >CENWAT ~ Central heating boilers/hot water heaters
  >CKR1 ~ Cookers
  >HTR1 ~ Space heaters (including gas fires and wall heaters)
  >MET1 ~ Meters
  >CPA1 ~ Combustion Analysis