Commercial compliance across the UK
TM44 Air Conditioning Inspections
An energy-efficiency inspection of your air conditioning systems, following TM44 methodology. Understand system performance and opportunities to reduce energy waste.
Building operators, facilities managers and commercial occupiers
When do you need it?
- Required for air conditioning systems with an effective rated output of more than 12 kW.
- Multiple units forming a system may count towards the threshold; share your system details so we can confirm the scope.
- Inspections must take place at intervals of no more than 5 years.
What’s included
- Inspection of relevant air conditioning systems
- Energy-efficiency inspection report
- Recommendations for operation and energy performance
Quotes reflect your building’s size, complexity and assessment requirements. Share your details and deadline so we can confirm the scope.
Compliance guide
TM44 air conditioning inspections: the 12kW rule
This guide covers the rules for England and Wales, as set out in GOV.UK guidance on air conditioning inspections.
Which systems need an inspection
All air conditioning systems with an effective rated output of more than 12kW must be regularly inspected by an energy assessor.
Several small units can count as one system
This includes systems made up of individual units under 12kW whose combined effective rated output is more than 12kW. One or more air conditioning units within a building controlled by a single person are treated as a single system.
How often
Inspections must be no more than five years apart. For systems first put into service on or after 1 January 2008, the first inspection must have taken place within five years of the system first being put into service.
Who is responsible
The person who controls the operation of the air conditioning system must make sure an inspection has been done in line with the regulations and keep the most recent inspection report.
Valid reports
Only inspection reports produced and lodged on the Energy Performance of Buildings Register by accredited energy assessors are valid. Every report produced since 6 April 2012 must carry a reference number generated on lodgement.
Rough guide to size
GOV.UK guidance suggests a general air-conditioned office of around 200 m² (with typical equipment and 8–10 m² per person) is likely to need about 12kW of cooling. Offices with high levels of IT may reach it at around 100 m². Share your system details and we will confirm whether you are in scope.
Not sure what applies to your building?
Send us your details and we’ll confirm the scope with your quote.
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This guide summarises official guidance and is not legal advice.
The details, made clear
Commercial compliance questions.
General guidance for England. Requirements and exemptions depend on your building and circumstances.