The TM44 directive requires ‘Member States across Europe to put in place measures to establish a regular inspection of air conditioning systems of an effective rated output of more than 12 kW’. In the separate UK TM44 legislation it has been introduced that building owners or managers are required to undertake regular inspections of their air conditioning systems.

TM44 inspection reports are valid for five years from the date of report completion, after which time production of a new inspection report is required by law.