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For Existing Engineers
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ACS Gas Renewal
For Existing Engineers

Renew your ACS qualifications and stay on the Gas Safe Register with ACS Gas Reassessment Courses at Options Skills.

Our ACS Gas Reassessment is for category 1 candidates with existing gas engineering skills, knowledge and experience. This also includes those looking to expand their skills and scope of work by adding more appliances.

To be eligible for ACS renewal, your ACS qualifications must have expired within the last 12 months or be due to expire.

LCL Assessed Course

LCL is a recognised Awarding Organisation, accredited by the United Kingdom Accreditation Service (UKAS). City and Guilds vs LCL


- CCN1 - Core Gas Safety (Inc CPA1 - Flue Gas Analyser).
- CENWAT - Central Heating Boilers and Water Heaters.
- CKR1 - Gas Cookers.
- HTR1 - Gas Fires.


£875 (Including VAT) - Finance Available

Entry Requirements

This course is designed for qualified engineers. For new entrants, please see ACS Initial Assessment.

Delivery Methods

3-5 Days Duration

Start Dates


About Our ACS Renewal Course

Why Undertake The ACS Renewal?

ACS qualifications must be renewed every five years to ensure gas engineers can continue working safely and legally and remain on the Gas Safe Register. This consistency ensures the engineers stay up to date with the latest learnings in courses such as CCN1, CKR1, and HTR1 and provide a comprehensive reassessment of skills.

Before acceptance onto an ACS Renewal Course, you must provide the following documentation:

  • Evidence of existing or previous gas qualifications or most recent gas safe card – you must provide the original copy of your previous ACS certificate.
  • National Insurance number.
  • Two recent passport-size colour photographs.

ACS Assessment takes place through written and practical examinations.

If you previously held ACS Gas Qualifications and were gas-safe, you will need to go through a renewal process. If your qualifications expired more than 12 months ago, you would need to undertake an Initial ACS Assessment. You will not be able to undertake a reassessment.

If you are a brand new entrant to the plumbing and gas industry, you will need to undertake an approved managed gas training programme such as our Domestic Gas Training before you can earn ACS Qualifications.

For more information, contact our team. We’re ready and waiting to help you find the right course for you.

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Learn More About The Course

ACS Renewal
Course Syllabus

  • Refresher Training:
    • Legislation
    • Pipework
    • Sizing
    • Testing
    • Pressures
  • Refresher Training
    • Flue Systems
    • Combustion
    • Ventilation
  • Refresher Training
    • Controls
  • Written & Practical Assessments
  • Appliance Assessment
The course syllabus is intended as a guide. Timings and delivery of course content are subject to change at the discretion of the training manager & individual course tutors.
ACS Renewal - Making Sure You're Qualified For Another Five Years

Refresher Training

As part of your ACS renewal/reassessment training, comprehensive refresher sessions are provided to ensure you’re thoroughly prepared for the assessment. This includes in-depth coverage of legislation, pipework, sizing, controls, testing, pressures, flue systems, combustion, ventilation, and controls.

ACS Renewal

ACS Renewal involves key certifications essential for a gas engineer. From CCN1 – Core Gas Safety (including CPA 1 – Flue Gas Analysers) to HTR1 – Gas Fires, CKR1 – Gas Cookers, and CENWAT – covering central heating, gas boilers, and water heaters, we’ve got your renewal needs covered.

Gas Safe Register

Staying on the Gas Safe Register is crucial, and for that, you need valid core qualifications. Maintaining CCN1 or COCN1 is essential to ensure your skills are up-to-date, allowing you to continue your valuable contribution to the industry while meeting regulatory requirements.

Student working on a gas cooker in the workshop
Domestic gas & heating training student working on a gas boiler in the workshop
Course Overview and Layout

ACS Gas Reassessment FAQs

Here, you can find several frequently asked questions about our ACS Gas Reassessment.

If you have any additional questions, don’t hesitate to get in touch for a free consultation with one of our specialist course advisors.

Do I Need Previous Experience?

Yes, to be eligible for ACS Renewal, you must already hold ACS qualifications or have held qualifications that have expired within the last twelve months.

If you do not have any experience, you can undertake an approved managed learning programme (MLP) to begin your career in the gas industry.

Do I Need An ACS Qualification?

Yes, holding an ACS qualification is a requirement for all gas engineers in the UK. Even qualified engineers must renew their ACS every 5 years.

How Long Is The ACS Renewal?

The ACS Renewal takes 3 – 5 days to complete. You must be in the centre from 8am – 4pm.

When Do I Need To Renew My ACS Qualifications?

Engineers must renew their ACS qualification once every five years.

Where Can I Complete My ACS Renewal?

The ACS Renewal is available at three of the Options Skills training centres. Located in; Birmingham, Manchester, and London.

How Often Do Courses Start?

We have new ACS Renewal courses starting monthly, so you’ll never have to wait long to begin training with Options Skills.

What Are The Payment Options?

We accept card or cash payments. For more information on payment options, please speak to our course advisors at 0800 802 1306.

How Do I Book An ACS Renewal?

To find out more and book your ACS Renewal, you can request a callback via our contact form or call us directly on 0800 802 1306. 

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