Updated government guidance gives building managers a clearer starting point for checking air-conditioning inspection responsibilities in England and Wales. The guidance was revised on 5 November 2026; the update should not be mistaken for the introduction of an entirely new inspection regime.
The publication's update note says the changes make the capacity threshold and inspection interval more prominent. It also clarifies the treatment of multiple units and buildings, mechanical ventilation and reports for more complex systems.
Which systems are covered?
The detailed guide says systems with an effective rated output greater than 12kW require inspection by an accredited energy assessor, with no more than five years between inspections. Several smaller units under one person's control within a building can together form a system above the threshold.
Separate buildings cannot simply be combined into one calculation or report in every case. The guidance distinguishes buildings sharing plant from those requiring individual reports. Managers should ask an assessor to confirm how their actual installation is treated.
An energy-efficiency inspection is also distinct from routine servicing and other obligations, including relevant refrigerant requirements. Having a maintenance contractor does not, by itself, establish that the inspection record is complete.
A practical property-management check
Our recommendation is to create a clear record for each building: the equipment inventory, rated outputs, who controls the system, the last inspection and where its report is stored. Start with existing documentation and ask the responsible contractor or assessor to resolve gaps rather than estimate capacity from the appearance of the units.
For a building changing hands or changing management, include these records in the handover checklist. Ask who will follow up identified actions and who is responsible for booking the next assessment. A calendar reminder is useful only when someone has clear responsibility for responding to it.
For landlords and occupiers, the value of this exercise is practical clarity. It reduces the chance that each party assumes another has dealt with the paperwork. Read the full official guide and obtain advice for the specific building; this article is a general introduction, not a technical assessment of any installation.
Sources checked 7 November 2026: https://www.gov.uk/government/publications/air-conditioning-inspections-for-buildings https://www.gov.uk/government/publications/air-conditioning-inspections-for-buildings/a-guide-to-air-conditioning-inspections