Planned maintenance and statutory duties
What does HVAC maintenance cost?
Nobody can price your building from a web page, and any site that prints a pound-per-square-metre average has made it up. What we can give you is the cost-driver table behind every planned maintenance quote, plus the part contract prices quietly depend on: the statutory duties attached to your plant. Air conditioning over 12kW effective rated output must be inspected at least every five years in England and Wales, and F gas leak checks run on their own clock set by the refrigerant charge.
What happens next
- Tell us about the building and the plant. Two minutes, no account.
- We pass your details to HVAC maintenance providers covering your postcode, and to no one else.
- They contact you with a price for your actual building. Compare, choose, or walk away.
HVAC Maintenance Cost is a free introduction service operated by Ellul Solutions Ltd; we pass your details to HVAC maintenance providers covering your building, who quote you directly. We may receive a fee from providers; you pay nothing and are under no obligation. We are independent and not affiliated with, endorsed by or acting for MHCLG, the Environment Agency, HSE or any accreditation scheme, and nothing here is legal or compliance advice: whether a duty applies to your building depends on its plant, and should be confirmed with a qualified assessor or contractor.
Statutory duties on a UK air conditioning system, and how often each falls due
Last updated
Facilities managers buying HVAC maintenance are really buying two things at once: keeping the plant working, and discharging duties that fall on whoever controls the system. The first has no legal timetable. The second does, and the intervals below come from official guidance rather than from a contractor's proposal. Check which of these your contract actually covers, because the gaps are where compliance quietly fails.
Air conditioning inspection rows are as stated in the gov.uk guide to air conditioning inspections, which explains the Energy Performance of Buildings (England and Wales) Regulations 2012 as amended in 2020; that guidance covers England and Wales only, with Scotland and Northern Ireland subject to separate requirements. F gas rows are as published by the Environment Agency and Defra on gov.uk. Both were read on 14 August 2026 and both regimes change over time, so check current guidance before relying on a threshold. The planned maintenance row states the absence of a statutory frequency, which is itself a finding rather than an omission. No prices appear in this table: there is no published UK dataset of HVAC maintenance prices we could honestly average.
| Duty | What triggers it | How often | Who does it |
|---|---|---|---|
| Air conditioning inspection | Effective rated output of more than 12kW, including individual units under 12kW whose combined output exceeds it | No more than 5 years apart | An accredited energy assessor who is a current member of an accreditation scheme; the report is lodged on the Energy Performance of Buildings Register |
| Inspection on change of control | You take over control of a system and were not given an inspection report by the previous operator | Within 3 months of taking over control | An accredited energy assessor |
| Keeping and passing on the report | Controlling an air conditioning system in scope | Keep the most recent report; give it to whoever takes over control | The person who controls the operation of the system |
| F gas leak checking | Equipment holding 5 to less than 50 tonnes carbon dioxide equivalent of F gas | At least once every 12 months | A qualified technician working for an F gas certified company |
| F gas leak checking | Equipment holding 50 to less than 500 tonnes carbon dioxide equivalent | At least once every 6 months | A qualified technician working for an F gas certified company |
| F gas leak checking and automatic leak detection | Equipment holding 500 tonnes carbon dioxide equivalent or more | At least once every 3 months, and automatic leak detection must be fitted and checked yearly | A qualified technician working for an F gas certified company |
| F gas record keeping | Equipment holding 5 tonnes carbon dioxide equivalent or more | Records kept for 5 years, including the certificate number of every company used | The operator of the equipment |
| Planned preventative maintenance | Owning plant you want to keep working | No statutory frequency: set by the manufacturer's recommendations, criticality and risk assessment | Your maintenance contractor, under a contract you write |
- All air conditioning systems with an effective rated output of more than 12kW must be regularly inspected by an accredited energy assessor, and the inspections must be no more than five years apart (gov.uk, England and Wales, 2026).
- Where individual air conditioning units are each under 12kW but their combined effective rated output exceeds 12kW, and they are controlled by one person in a building, they count as one system in scope of inspection (gov.uk, 2026).
- If control of an air conditioning system passes to a new operator who was not given an inspection report, the system must be inspected within three months of the new operator taking over (gov.uk, 2026).
- There is no legal requirement to act on the recommendations in an air conditioning inspection report, and the report is only valid once lodged on the Energy Performance of Buildings Register by an accredited energy assessor (gov.uk, 2026).
- There is no statutory frequency for planned preventative maintenance of HVAC plant: PPM intervals are a contract and risk decision driven by manufacturer recommendations and criticality, unlike the statutory inspection and F gas leak check duties.
Cite this page
“Statutory duties on a UK air conditioning system, and how often each falls due”, HVAC Maintenance Cost, https://hvacmaintenancecost.co.uk/ (updated 2026-08-14). Air conditioning inspection rows are as stated in the gov.uk guide to air conditioning inspections, which explains the Energy Performance of Buildings (England and Wales) Regulations 2012 as amended in 2020; that guidance covers England and Wales only, with Scotland and Northern Ireland subject to separate requirements. F gas rows are as published by the Environment Agency and Defra on gov.uk. Both were read on 14 August 2026 and both regimes change over time, so check current guidance before relying on a threshold. The planned maintenance row states the absence of a statutory frequency, which is itself a finding rather than an omission. No prices appear in this table: there is no published UK dataset of HVAC maintenance prices we could honestly average.
Guides
Every figure sourced and dated.
The questions we get
How much does HVAC maintenance cost?
It depends on the asset list, visit frequency, scope and access, and there is no published UK dataset of HVAC maintenance prices we could honestly average, so we do not print one. Cost per square foot is a weak benchmark because plant density varies hugely between buildings of the same size. Issue an asset list and a stated visit frequency and the quotes you get back become comparable.
How often does air conditioning have to be inspected by law?
In England and Wales, air conditioning systems with an effective rated output of more than 12kW must be regularly inspected by an accredited energy assessor, and gov.uk states inspections must be no more than five years apart. Individual units under 12kW count together where their combined output exceeds 12kW. Scotland and Northern Ireland have separate requirements.
Is there a legal frequency for planned HVAC maintenance?
No. PUWER requires work equipment to be maintained in an efficient state, in efficient working order and in good repair, and HSE expects inspection frequency to be set by risk assessment. There is no statutory PPM interval, so quarterly or twice yearly is a decision you make from manufacturer guidance, criticality and environment, and should be able to justify.
Do F gas leak checks come with an HVAC maintenance contract?
Only if the contract says so. F gas leak checking is a separate duty with its own frequency, set by the carbon dioxide equivalent of the refrigerant charge: at least every 12 months from 5 tonnes, 6 months from 50 tonnes and 3 months from 500 tonnes. As operator you also keep the records for five years, including the certificate number of every company that works on the plant.
Who is responsible for air conditioning compliance in a leased building?
The person who controls the operation of the system, which gov.uk describes as the person controlling its technical functioning. That is usually the owner, even where day-to-day operation is contracted out, but a facilities management or servicing contract can make that company responsible as well. Gov.uk states the landlord or occupier retains a parallel duty to ensure inspections happen.
Is this quote service really free?
Yes, free to you and with no obligation to accept any quote. We pass your details only to HVAC maintenance providers covering your building, who quote you directly. We may receive a fee from those providers, which is how the service is funded.