Introduction

The initial assessment for the core domestic gas safety qualification, CCN1, plus associated appliance modules is designed for gas engineers with certificates that have expired by more than 12 months or who are entering the domestic gas installation sector under the ACS scheme for the first time. At Hull Gas Training Ltd, based in Hull, East Yorkshire, we deliver this comprehensive 3-day programme to ensure you meet the latest UK industry standards for safe and competent work on domestic gas installations.

This course covers the full scope of core domestic gas safety including legislation, installation techniques, combustion analysis and appliance work and includes training plus assessment so you can apply for registration on the Gas Safe Register upon successful completion.

Who This Course Is For

• Gas engineers whose ACS certificate (CCN1 and/or appliance modules) has lapsed by more than 12 months.
• Practising heating engineers seeking to regain full scope for domestic gas installation, servicing and fault-finding.
• Candidates who already hold relevant plumbing/heating qualifications and want to enter the domestic gas sector under the ACS scheme.
• Technicians who need comprehensive training and assessment in both core safety and appliances before applying for Gas Safe registration.

What You’ll Learn

Module 1: CCN1 – Core Domestic Gas Safety

• Gas Safety (Installation & Use) Regulations and associated standards and legislation.
• Combustion principles, burner pressures, gas rates and appliance controls.
• Ventilation requirements, flueing systems, chimney construction and testing methods.
• Tightness testing, pipework purging, low and medium pressure procedures and purging methodology.
• Unsafe situations, emergency procedures, isolation controls, warning notices and safe working practices.

Module 2: Appliance Modules – CENWAT, CKR1 & HTR1 (Includes CPA1)

• CENWAT – Domestic gas central heating boilers and water heaters: installation, servicing, fault-finding and commissioning.
• CKR1 – Domestic gas cookers: installation, servicing, commissioning and fault diagnosis in accordance with ACS standards.
• HTR1 – Domestic gas fires, wall heaters and space heaters: installation, servicing, flue inspection and safety testing.
• CPA1 – Combustion Performance Analysis: use of flue-gas analysers, interpretation of measurements and verifying safe combustion.
• Hands-on training in realistic appliance bays, enabling practical competence under assessor observation.

Assessment & Certification

• The assessment includes multiple-choice theory exams (open and closed book) and practical assessments in a realistic working environment.
• Successful candidates will receive ACS certification for CCN1 and the appliance modules undertaken, enabling registration on the Gas Safe Register (subject to meeting all registration criteria).

Why Train With Hull Gas Training

• As a long-established, family-run training centre in Hull, East Yorkshire, we bring years of experience in industry and education to each course.
• With small class sizes (maximum 4 delegates) we deliver personalised support, high-quality teaching and strong success rates.
• We provide full administrative assistance—booking, accreditation liaison and Gas Safe registration guidance—making your journey efficient and professional.