News ‐ Do I Need a TM44 Inspection?

Published: 14/01/2022

What is a TM44?

TM44 is the framework or guidelines upon which the efficiency of air conditioning units is measured. TM44 guidelines support the Energy Performance of Building Directive (EPBD), ensuring compliance for certain businesses and air conditioning systems. Although most TM44 inspections are completed as part of the EPDB requirements, a business can have an inspection simply to understand the efficiency of their air conditioning system which can highlight potential improvements to both efficiency and cost-saving.


What is a TM44 Inspection?

TM44 inspection has been part of UK legislation. Inspections involve a visit from an independent, accreditor energy assessor. The assessor will review all the air conditioning systems of a business. They will review how the system is being used, serviced, and generally maintained. The assessor and report will highlight recommendations on how the air conditioning systems could be more efficient, such as adjusting controls, timers etc. to improve performance. The report will also recommend any changes to the system such as replacements or alternative solutions which may be deemed more efficient. The purpose of an inspection is to ensure the system is being used correctly, often reports find that system settings can be improved.


The report itself will usually include the following elements

  • The current performance/efficiency of the system
  • Suggestions for improvements
  • Any system faults or issues identified
  • A review of system maintenance and recommendations for improvements
  • A review of the cooling load compared to the size of the system and recommendations for improvement
  • A summary of key findings and recommendations


A TM44 inspection is not only a legal requirement but also an effective way of reducing your air conditioning costs.


Who needs a TM44 Inspection?

All commercial buildings with air conditioning systems and an output capacity of 12w or more must have their systems inspected every five years by law. It is worth noting that the same also applies to systems that are made up of several individual units. If the total combined output exceeds 12w then the system falls under the same legislation requirements. Typically business premises from around 200m2 are likely to have an air conditioning system with outputs starting around 12w but it’s worth noting this does depend on the nature of the premises. For example, if you have a lot of computer equipment in your business, then the area can be much smaller than this but with the same air conditioning output. 


Is a TM44 Inspection a Legal Requirement?

Yes, all businesses with an output of 12w must get an inspection every five years. Whilst the inspection itself is a legal requirement every five years. For new systems or premises, the first inspection should take place before the system is five years old. Subsequent inspections should be made every 5 years or less to remain compliant. 

The punishment for failing to comply with TM44 regulation is a fixed penalty of £300. There is an additional £200 fine if the outstanding report is not provided within the next 7 days. This fine can be repeated weekly until you have a valid certificate in place which can, quite quickly, add up to a very significant fine for your business. Enforcement can be easily checked at any time based on the government database so it’s important to stay up to date and compliant. 


How do I know if a TM44 inspection is due?

Many companies are unaware when the last TM44 inspection took place or even if they require one by UK law. If you are unsure, please contact us and we’ll be able to ensure you are fully compliant.