ACS Reassessment

ACS Reassessment is for those Category 1 candidates who are experienced gas fitters with existing gas knowledge and skills. These are operatives looking to renew certificates which have expired (less than 12 months) or are due to expire. Additionally, Category 1 candidates are also those of you looking to add appliances and expand your scope of work.

QualificationCCN1 / CENWAT / CPA / CKR / HTR etc
LocationDartford, Kent (Accommodation Available)
Entry Requirements

ACS with an expiry of less than 12 months


1 Week (Mon - Fri)

Easy payments
Flexible Training
Interest Free Payments
Accommodation Available

Duration & Cost


Core Gas Safety£495.00 including vatUp to 5 Days –  Reassessment

CCN 1 + 4:

Core Gas Safety & 4 Appliances (inc CPA1)£795.00 including vatUp to 5 Days –Reassessment

 Appliance Only

Central Heating Boilers£120.00 including vatMaximum 1 Day


Combustion Performance Analysis£120.00 including vatMaximum 1 Day


Domestic Cookers£120.00 including vatMaximum 1 Day


Gas Fires and Wall Heaters£120.00 including vatMaximum 1 Day


Meters£120.00 including vatMaximum 1 Day


Warm Air Heating Appliances£120.00 including vatMaximum 1 Day

Course details

This is a period of learning and assessment for individuals to renew their ACS certificates. Your training/revision period will be easier to determine if you can advise if you have been regularly undertaking the areas of gas work covered by your existing certification.

Reassessment ACS is a mixture of assessing both your practical skills and theory knowledge. You can undertake assessment for:

CCN 1/CPA1: Core Gas Safety

CENWAT 1: Central Heating Boilers

CPA 1: Combustion Performance Analysis

CKR 1: Domestic Cookers

HTR 1: Gas Fires and Wall Heaters

MET 1: Meters

At Able Skills, our aim is to provide existing Gas Engineers with an Assessment or Re-Assessment process which is straight forward and to the point. We offer a non-complex price guide which takes out the hassle of calculating your fees! With Able Skills there are no hidden extras and all prices include:

  • VAT
  • Registration
  • Certification

*If candidates fail to achieve the required level of competency in either the practical or theory assessment, it may be necessary for them to re-sit the sections which they have failed. If this situation arises an additional cost may be incurred.

As an experienced gas fitting operative considering renewal of CCN1 and/or Appliances or looking to add Appliances, you must provide:

  • Your GAS SAFE registration number or the GAS SAFE registration number of the business that employs you
  • Your National Insurance number
  • 2 recent colour photographs
  • Expired Certificates where available

Expired ACS certificates must be within 12 months of expiry to qualify you as a Category 1 candidate eligible for Reassessment. If your certificate expiry is more than 12 months ago then you will require Initial Assessment.

Please be aware that training is not a pre-requisite of any assessment.

Please be aware that we will allocate a full 5 days for this assessment process. If you fail at any stage or run out of time, you will need to rebook and you will need to pay again for the full weeks fees. Our student/instructor ratio is set by our certificating body and we are unable to slot in odd days.

Gas Engineer Courses at Able Skills

Courses open to you after

If you hold Domestic ACS and are interested in working with commercial gas appliances, Able Skills offers a Commercial Gas Changeover package which incorporates both training and ACS Commercial Assessment

  1. Gas Engineer Gas Engineer

    Commercial Gas Changeover


    Great if you hold domestic ACS and are considering moving in to the commercial gas industry, this course is the complete changeover progr...



All of our courses take place at our dedicated training centre in Dartford, Kent. The centre is easily accessible by road, being just 10 minutes from junction 1a on the M25. We are only a short walk from Dartford train station which is served by frequent trains taking 35 minutes from central London. For anyone travelling from further away, we have our own accommodation available at only £25 per night.

We are open Mon - Fri and 2 weekends per month for training and visitors so if you would like to find out more about this course or about Able Skills, please feel free to pop in, no appointment necessary.

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