Skip to main content Skip to footer

Air Conditioning Inspector

Carry out mandatory TM44 air conditioning inspections and help building owners improve energy efficiency and comply with regulations.

What Does an Air Conditioning Inspector (ACI) Do?

As an ACI, you are qualified to carry out inspections in line with TM44 guidance and the Energy Performance of Buildings Regulations. These inspections are required by law for systems over 12kW and must be conducted at least every five years.

Why Get Certified?

  • Meet legal requirements for TM44 inspections
  • Help clients reduce energy use and operating costs
  • Be listed on the CIBSE Certification Register
  • Demonstrate professional competence to employers and clients
  • Access support, templates and technical updates from CIBSE Certification

Who Can Apply?

ACI certification is ideal for:

  • Building services engineers
  • Energy assessors
  • HVAC professionals

Applicants must demonstrate technical knowledge, complete relevant training, and meet the competency requirements of ISO 17024:2012.

How to Apply

Download application form →
View current fees →

APEL Route

CIBSE Certification operates the APEL (Approval of Prior Experience & Learning) Route to certification.

The APEL route is a fast, low cost route that recognises your prior experience and learning as an alternative to taking a specific Energy Assessor qualification and can provide certification to the highest quality via an application process.

CIBSE Certification are able to offer this route to all highly skilled/experienced practitioners who already have the knowledge and will be able to demonstrate their competence to meet the National Occupational Standards (NOS) without the need to obtain a specific Energy Assessor qualification.

This route is open to those with a minimum of 2 years of full time substantial experience in the last 5 years, in the following areas:

  • (LCEA) A/C - designing, installing, (including commissioning) or maintaining air conditioning systems; Level 4 for complex systems or Level 3 for simple systems. More information here.

The above routes allow the applicant entrance to the LCEA register.

Transfer route

CIBSE Certification accepts any applicants that are already certified via the APEL route as EPC, DEC or A/C assessors with other certification bodies via the Transfer Route. The applicant will need to provide supporting documentation (please refer to the transfer route under EPC, DEC or A/C for the information required for each of the 3 strands EPC, DEC or A/C).

Exam Information

Knowledge of Approved Document L is a mandatory requirement of the Air Conditioning certification. If you have not passed an LCC exam since April 2022 you will be required to take the online Part L 2021 Update exam which you can book here.

Certification Fees

  • One off non-refundable assessment fee: £450 + VAT (an additional assessment fee of £150 + VAT may be applicable for additional reviews)
  • Annual registration fee: £330 + VAT


If you are already a CIBSE Certification LCEA DEC Assessor or EPC Assessor the annual registration fee is discounted at £150 + VAT

Useful Documents 

A Guide to Air Conditioning Inspections for Buildings (DCLG)

Energy Certificates and Air Conditioning Inspections for Buildings (DCLG)

TM44 Addendum for Scotland

TM44: Inspection of Air Conditioning Systems (available for purchase from CIBSE Bookshop)