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Dates are available upon request, please contact 01254 292451 or email for further information.

This assessment will enable gas engineers to expand their scope of work to include (DAH1) Warm Air Heating. The assessment will cover domestic gas fired ducted air heaters less than 70kWnet.

A re-assessment for (DAH1) Warm Air Heating, which is required every five years, is also available at a reduced cost.

What will I study?

Training is available prior to carrying out the assessment if required.

Entry requirements

Must already be accredited with either:

  • (CNN1) Domestic Gas Safety
  • (COCDN1) Change over for Commercial  Core to Domestic Gas

For re-assessment, which is required every five years, candidates must already be accredited with Warm Air Heating (DAH1).

How will I be assessed?

Candidates will complete a series of written and practical assessments.

What can I do next?

Candidates may consider looking to add other appliances such as (CKR1) Cookers, (LAU1) Laundry etc. to expand their scope of work.

We offer a wide range of Gas courses. Contact the Gas team on 01254 292451/01254 292500 or email

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