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TM44: Inspection of Air Conditioning Systems


To meet the requirements described in Article 9 of the Energy Performance of Buildings Directive (EPBD), Europe, air conditioning systems with an output greater than 12kW require frequent inspections.

Legislation and Requirements

The UK government has introduced legislation to meet the Energy Performance of Buildings Directive (EPBD) requirement to bring into force “the necessary laws, regulations and administrative provisions to comply with the Directive”. Member States are required, under Article 9, to introduce measures to establish a regular inspection of air conditioning systems.

Air conditioning units along with directly associated supply air ventilation systems have been identified in this legislation because they account for a large amount of the energy usage in a building. In 2012, the UK Government adopted the inspection standards defined in the Chartered Institution of Building Services Engineers (CIBSE) Technical Memorandum document TM44 “Inspection of Air Conditioning Systems”. Since 2012 the legislation has required all reports produced by accredited inspectors to be produced and lodge using approved software.

Inspections provide the owners and occupiers of a building with information about the performance of their air conditioning systems and identify ways that the efficiency can be improved to reduce CO2 emissions and save energy. 


All buildings with installed air conditioning systems that have an output of 12kW or above require an air conditioning inspection to the TM44 standard by an accredited inspector. It is the responsibility of building owners and facilities managers who control the operation of air conditioning systems to commission this report as it is a statutory requirement.

NDC Can Assist Your Organisation:

Through our national network of registered air conditioning assessors NDC can undertake air conditioning surveys in accordance with EPBD. We are experienced in working on large and complex sites for public and private sector Clients, as well as with refrigeration installations. We aspire to add value to our assessments by providing practical, realistic advice in terms of carbon management and energy efficiency, as well as a summary of all assets in compliance with the latest F-gas regulations 2015 and recommendations for remedial works.