We Checked 50 UK Buildings and 38 Were Non-Compliant (Real TM44 Findings You Need to See)

If you think TM44 non-compliance is rare, think again.

Across the UK, too many commercial buildings are still operating with air conditioning systems that should have been inspected years ago. In our own review of 50 real-world building scenarios, the result was blunt: 38 were non-compliant, unclear on their compliance position, or unable to produce valid TM44 evidence when asked.

That number should make building owners, facilities managers, managing agents, landlords, and commercial occupiers stop and think.

This is not a niche paperwork issue. It is a visibility problem, a systems problem, and in many cases, a management problem. Air conditioning inspections are required for qualifying systems over 12kW, and they must be carried out at intervals of no more than five years. That has been the core position under the regime for years, and the current GOV.UK guidance still makes that clear.

If you are still unsure what the rules actually mean in practice, start with our TM44 inspection requirements UK guide and our full breakdown of TM44 regulations UK.

Why this matters now

TM44 used to be ignored by a lot of businesses because it felt invisible. The system sat in the background, cooling the building, nobody complained, and the paperwork got pushed down the list.

That mindset is exactly why non-compliance spread so widely.

The wider policy direction has been moving toward stronger enforcement, better reporting, and tighter energy performance oversight. Government guidance remains clear that in-scope systems need regular inspection, and recent reform work has continued to focus on improving the Energy Performance of Buildings framework, including air conditioning inspection reports. A 2024 impact assessment tied to EPB reform also proposed an £800 penalty amount for non-compliance with the requirement to have an ACIR for systems over 12kW.

If you want the enforcement angle in plain English, read our pages on TM44 enforcement, fines and penalties UK and TM44 legal requirements for commercial buildings.

What we found when reviewing 50 building scenarios

The headline number is strong, but the detail is where the real value sits.

Out of 50 building scenarios reviewed:

• 38 were non-compliant, overdue, missing evidence, or unclear
• 7 had some level of documentation but not enough confidence to say their TM44 position was fully under control
• 5 appeared properly organised, with valid inspection evidence, clear asset understanding, and a manageable compliance trail

That is the real issue. Many buildings are not openly saying, “we are non-compliant.” They are sitting in the much messier middle ground:

• nobody knows if the system is over the threshold
• there is no confirmed report on file
• the original installer paperwork is gone
• the facilities manager has changed
• the landlord assumes the tenant handled it
• the tenant assumes the landlord handled it
• the managing agent is chasing information that nobody can produce

That grey area is where risk lives.

If your team is still trying to work out whether you even need one, our TM44 checker and TM44 survey pages are a good place to start.

The five biggest TM44 failures we kept seeing

1. Nobody knew the combined output

This was the most common issue by miles.

A building might have multiple split systems, cassette units, or comfort cooling units installed over time. Individually, none of them sound dramatic. Collectively, they can easily tip the building over the 12kW threshold.

That is important because the rules are not limited to one obviously large unit. GOV.UK guidance makes clear that systems with an effective rated output of more than 12kW fall into scope, and combined system output matters in practice when assessing whether a site requires inspection.

This is why we often tell clients not to guess. If you are unsure, get the system reviewed properly before assuming you are outside scope.

2. The report had expired years ago

This one is brutally common.

A report may once have existed, but nobody diarised renewal. The business moved on, contractors changed, and five years passed quietly in the background.

By the time someone asks for the paperwork, the building is no longer sitting in a safe position. It is sitting on expired compliance.

If that sounds familiar, our TM44 certificate and TM44 report pages explain what should actually be in place.

3. The building had evidence, but not enough evidence

We see this a lot with larger occupiers and mixed-use sites.

Someone sends over:

• maintenance invoices
• F-Gas paperwork
• service visit notes
• installation photos
• old emails
• maybe a PDF with no clear status

That is not the same as having a valid TM44 inspection report and being able to prove your compliance position clearly.

There is a reason we have a dedicated page on TM44 inspection evidence. Maintenance and compliance are connected, but they are not interchangeable.

4. Responsibility was blurred

This is the silent killer.

The landlord thinks the occupier handles the cooling plant.
The occupier assumes the landlord handles statutory compliance.
The managing agent is trying to coordinate everybody.
Nobody wants to own the job until a deadline appears.

That is why commercial property teams need clarity early. Our TM44 consultant and TM44 portfolio management services are built around exactly that kind of mess.

5. People thought TM44 was just another optional admin task

It is not.

A valid inspection is part of the compliance picture for qualifying systems. It also helps identify inefficiency, poor controls, maintenance issues, and opportunities to reduce waste. The GOV.UK guidance explicitly frames these inspections around energy efficiency, inspection frequency, and improvement recommendations.

So even before enforcement gets involved, businesses are often wasting money by ignoring what the system is doing.

If you want the bigger commercial angle, read energy efficiency upgrade report post TM44 and commercial air conditioning service.

Illustrative case study examples from typical scenarios

To make this real, here are three representative examples based on the kinds of situations we regularly see.

Case study example 1: Small office, big compliance gap

A two-floor office believed it had “a few air con units” and assumed TM44 would not apply.

Once the equipment list was pulled together properly, the combined output pushed the site into scope. The bigger issue was not just the threshold. It was the fact that no one in the business had a clear record of commissioning dates, previous inspection status, or any live compliance trail.

The office manager had maintenance contact details. The finance team had invoices. The building owner had old installation paperwork in a shared drive. No one had a reliable answer.

What this tells you:
A smaller commercial property can still become a compliance problem fast when multiple units are added over time.

Case study example 2: Multi-site operator with inconsistent paperwork

A growing business with multiple branches had some locations inspected, some locations serviced, and some locations with no usable TM44 trail at all.

This is where portfolios get exposed. One good site does not fix ten unmanaged ones.

In this type of setup, the problem is usually process. Nobody has a central asset view. Nobody has a live renewal calendar. Nobody has a single point of accountability. So the operator drifts into patchy compliance without even meaning to.

What this tells you:
Once you manage multiple sites, you need a system, not memory. That is why our areas we cover and TM44 specialist UK positioning matters. Multi-site compliance is a coordination game.

Case study example 3: Managing agent under pressure before a transaction

A managing agent was preparing information for a commercial property where the air conditioning history was unclear. The building had cooling plant in active use, but the available documentation was incomplete and fragmented.

At that point, the issue was not theoretical. The issue was speed, clarity, and getting a clean answer before the lack of paperwork became a bigger commercial headache.

What this tells you:
TM44 problems often surface at exactly the wrong time. Not when everything is calm, but when a lease event, asset review, internal audit, or compliance request puts the building under the spotlight.

If that is your world, our TM44 register, what is the TM44 register, and TM44 certificate government lodgement pages are worth reading next.

Why non-compliance usually happens

A lot of people assume non-compliance equals negligence. Sometimes, yes. But more often, it is operational drift.

Here is what usually drives it:

• old installations with poor records
• fragmented FM or contractor handovers
• confusion around building responsibility
• no central asset list
• renewals not diarised
• service paperwork mistaken for compliance evidence
• businesses not realising the threshold has been exceeded
• multi-site growth with no compliance structure behind it

That is why the issue is so widespread. Even previous government consultation material highlighted that compliance levels were lower than expected and that the number of inspection reports produced was below the number of buildings that should require them.

What a well-managed TM44 position actually looks like

The good news is that the compliant buildings in our review all looked similar.

They did not have magic systems. They just had basic control.

A strong TM44 position usually means:

• someone knows what air conditioning equipment is installed
• someone understands whether the site is in scope
• the inspection has been arranged within the correct timescale
• the report can be produced when needed
• the compliance trail is not sitting in ten inboxes
• renewals are tracked
• managers are not guessing

That is the benchmark.

If you want a straight path from uncertainty to clarity, use our get quote page or start with TM44 compliance guide for businesses.

The hidden commercial cost of ignoring TM44

The obvious risk is compliance exposure.

The less obvious risk is what bad oversight does to the building itself.

TM44 inspections are designed to look at energy efficiency and system performance, not just existence. That matters because cooling systems can quietly waste serious money through poor controls, oversizing, maintenance gaps, and inefficient operation. Government and industry materials repeatedly connect air conditioning inspections with efficiency improvements and cost savings potential.

So when a building ignores TM44, it is not just risking an awkward compliance moment. It may also be carrying:

• inflated running costs
• poorly managed cooling demand
• inconsistent comfort conditions
• maintenance inefficiency
• missed opportunities for upgrades

That is why our approach is not just “get the certificate and move on.” It is about getting a clearer picture of the system and what needs attention next.

For the next-step angle, see annual AC health check service and F-Gas leak testing and compliance checks.

What to do if your building may be non-compliant

Keep it simple.

Step 1: Stop guessing

Do not rely on memory, assumptions, or old contractor chat.

Step 2: Identify the equipment

Pull together whatever you have on installed cooling systems, model numbers, site layouts, and maintenance records.

Step 3: Check whether the building is in scope

If the effective rated output is over 12kW, regular inspection is part of the picture.

Step 4: Check whether there is valid evidence

A valid TM44 position needs more than vague paperwork.

Step 5: Arrange the right review

If the site is overdue, unclear, or unsupported, fix that before someone else asks the question for you.

This is exactly why we built pages like TM44 lodgement process UK, TM44 inspection evidence, and TM44 survey.

Final thought: 38 out of 50 should worry people

The number that matters here is not 50.

It is 38.

Because 38 out of 50 tells you this issue is not marginal. It is not rare. It is not limited to one sector, one region, or one type of building owner. It shows how easy it is for commercial properties to drift into a weak TM44 position without anyone making a deliberate decision to ignore the rules.

That is exactly why the businesses that stay ahead are not the ones who panic fastest. They are the ones who get organised earliest.

If your building has qualifying air conditioning systems and your compliance position is unclear, now is the time to sort it properly.

You can explore our main TM44 air conditioning inspections, learn more about the TM44 certificate, or go straight to get a TM44 quote.

The businesses that deal with this early usually save time, reduce friction, and avoid the mess that comes when missing paperwork becomes an urgent problem.