HETAS / H004

H004 | HETAS Wet Appliance Installer Course


Duration: 2 days

The H004 is suitable for plumbing and heating installers who have already successfully completed the H003 course (time limited). The course is important for the safe and effective installation of solid fuel wet appliances. The course discusses advancements in technology, including integration with other types of wet heating. Successful completion of the H004 course allows HETAS registrants to extend their scope of registration with HETAS on the competent persons registration scheme.


Suitable for

Candidates with plumbing & heating qualifications & who have successfully completed the H003 course


Assessment Method

Theory & Practical


Course Outcome & Certification

HETAS certificate



HETAS H003 Dry Appliance Installer Course and at least one of the following:

  • Evidence of OFTEC 101 or 102
  • Evidence of Gas Safe Registration - CCN1 & CEN1
  • Evidence of formal plumbing and heating qualification i.e. City & Guilders 6129 and 6089, or QCF 6189, or equivalent
  • Evidence of equivalent work experience on wet heating systems 
  • N/SVQ Level 2/3 in plumbing or equivalent earlier certification that provides evidence of competence 


Course Content

✔ Wet system design & specification 
✔ The installation of solid fuel appliances with boilers incorporating vent systems
✔ The principles of gravity circulation
✔ System controls
✔ Integration with other types of wet heating systems
✔ Heating system commissioning handover 
✔ Service & maintenance 
✔ Discussions on the advancements in technology



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