TM44 Inspection FAQs — Your Questions Answered by AirCert

Understanding TM44 Inspections — The Basics

Finding clear answers to your TM44 inspection FAQ queries can be surprisingly difficult. With conflicting information online and technical jargon everywhere, many building managers end up confused about their legal obligations. This comprehensive guide addresses the most common TM44 questions I encounter as a qualified energy assessor, giving you straightforward answers you can rely on.

What is a TM44 inspection?

A TM44 inspection is an independent energy assessment of your commercial air conditioning system, named after CIBSE Technical Memorandum 44 which sets out the inspection methodology. During the inspection, I examine your AC equipment, controls, distribution systems, and maintenance records to identify opportunities for improving energy efficiency. The assessment results in a formal report containing recommendations for reducing energy consumption and running costs, along with a lodged certificate proving compliance with the Energy Performance of Buildings Regulations 2012.

Is a TM44 inspection a legal requirement?

Yes, TM44 inspections are a legal requirement under the Energy Performance of Buildings (England and Wales) Regulations 2012. Any commercial building with air conditioning systems that have a combined effective rated output exceeding 12kW must have a valid TM44 inspection certificate. This isn’t optional guidance — it’s enforceable legislation with financial penalties for non-compliance. The requirement applies regardless of whether you own or lease the building, and regardless of when the system was installed.

What size air conditioning system requires a TM44 inspection?

The threshold is 12kW combined effective rated output. This means you need to add together the cooling capacity of all your air conditioning units — if the total exceeds 12kW, you need a TM44 certificate. Many building managers are surprised to learn that even relatively modest systems can exceed this threshold when combined. A typical office with six or seven split system units, or a building with a small VRF system, will usually require inspection. When in doubt, check the rated output shown on the unit’s data plate or installation documentation.

TM44 Inspection FAQ — Frequency and Validity

How often does a TM44 inspection need to be carried out?

TM44 inspections must be carried out at least every five years. This five-year cycle runs from the date of your last inspection, not from a fixed calendar point. You cannot simply wait until enforcement officers come calling — the onus is on the building’s responsible person to ensure the certificate remains current. I recommend booking your next inspection a few weeks before your current certificate expires to allow time for any scheduling adjustments.

How long is a TM44 certificate valid for?

A TM44 certificate remains valid for five years from the inspection date. After this period, the certificate expires and you must arrange a new inspection to maintain compliance. There’s no grace period written into the regulations — once your certificate expires, you’re technically non-compliant from that moment. The certificate includes an expiry date clearly printed on the document, so there’s no ambiguity about when renewal is due. [INTERNAL LINK: tm44-inspections]

Can I get an extension if my certificate has expired?

No, there’s no mechanism for extending an expired TM44 certificate. Once your certificate has lapsed, the only option is to arrange a new inspection as quickly as possible. The regulations don’t provide for extensions, appeals, or temporary exemptions based on administrative oversight. If your certificate has expired, contact me promptly — I can often accommodate urgent bookings to minimise your period of non-compliance. Acting quickly demonstrates good faith should any enforcement action be considered.

The Inspection Process — What to Expect

Who can legally carry out a TM44 inspection?

Only energy assessors holding a valid Level 3 or Level 4 Air Conditioning Certificate can legally conduct TM44 inspections and lodge certificates on the national register. I hold both Elmhurst Level 3 and Level 4 accreditation, issued by Elmhurst Energy — the UK’s leading energy assessor accreditation body. Using an unaccredited inspector means any certificate they produce is worthless and won’t appear on the official register. Always verify your inspector’s credentials before booking, and be wary of unusually cheap quotes from operators who may not hold proper accreditation.

How long does a TM44 inspection take?

The duration depends on the size and complexity of your air conditioning systems. A straightforward inspection of a small office with a few split units might take two to three hours, including the documentation review and physical assessment. Larger buildings with complex VRF systems, multiple zones, or extensive plant rooms may require a full day or longer. I always provide a realistic time estimate when booking, based on the system information you supply. Rushing a TM44 inspection compromises quality and potentially misses important efficiency recommendations.

What documents should I have ready for the inspection?

Gathering your documentation beforehand makes the inspection run smoothly and ensures you receive the most valuable recommendations. Ideally, you should have maintenance records, service contracts, equipment schedules, control system documentation, and any previous TM44 reports available. Installation commissioning certificates, F-Gas records, and building management system data are also useful if available. Don’t worry if some documents are missing — I can still complete the inspection, though your report may note gaps in the available information.

What if I can’t find my maintenance records?

Missing maintenance records don’t prevent the inspection from going ahead, but they may affect the recommendations in your report. Without evidence of regular servicing, I’ll likely recommend establishing a documented maintenance regime as a priority action. If your maintenance contractor holds records on your behalf, ask them to provide copies before the inspection. The absence of records is noted in the report and may be raised if enforcement officers review your compliance, so it’s worth making reasonable efforts to locate historical documentation.

TM44 Inspection FAQ — Costs and Outcomes

What does a TM44 inspection cost?

TM44 inspection costs vary based on system complexity, site location, and the number of units requiring assessment. I provide clear, fixed-price quotes after understanding your specific requirements — there are no hidden fees or surprise charges. For straightforward single-site inspections in the North East, expect to pay considerably less than multi-site portfolios or complex industrial installations. Contact me with your system details for an accurate quote, typically provided within twenty-four hours of your enquiry.

What’s the difference between a TM44 inspection and an air conditioning service?

A TM44 inspection and a routine service are entirely different activities with different purposes. Air conditioning servicing is practical maintenance work — cleaning filters, checking refrigerant levels, testing electrical connections, and ensuring the system operates safely. A TM44 inspection is an energy assessment focused on identifying efficiency improvements and verifying compliance with regulations. Having your system serviced doesn’t fulfil your TM44 obligations, and a TM44 inspection doesn’t replace regular maintenance. You need both, carried out by appropriately qualified professionals.

Is there a pass or fail outcome from a TM44 inspection?

TM44 inspections don’t result in a simple pass or fail verdict. Every completed inspection produces a lodged certificate and a detailed report containing recommendations rated by priority and potential impact. Your system might be running efficiently with minimal recommendations, or it might have numerous improvement opportunities — either way, you receive your certificate. The purpose is advisory rather than punitive, helping you identify cost-saving measures. However, persistent failure to act on critical recommendations could be relevant in future enforcement considerations.

Compliance and Enforcement Questions

What happens if I don’t have a TM44 certificate?

Operating without a valid TM44 certificate means you’re in breach of the Energy Performance of Buildings Regulations. Local authority trading standards officers have powers to request evidence of compliance and can issue penalty charge notices for non-compliance. Beyond the financial penalties, lacking certification can complicate property transactions, lease negotiations, and insurance arrangements. Some corporate tenants now require landlords to demonstrate TM44 compliance as part of their environmental due diligence before signing leases.

Can I be fined for not having a TM44 certificate?

Yes, penalty charge notices can be issued for TM44 non-compliance. The fine can be up to £300 for failing to have a valid certificate, with additional penalties possible for failing to display the certificate or for providing false information. While active enforcement has historically been inconsistent, this is changing as local authorities increase their focus on building energy compliance. The relatively modest fine doesn’t reflect the reputational damage and administrative hassle that enforcement action creates for businesses.

Responsibility and Ownership Questions

I’ve just taken over a building — am I responsible for TM44?

When you take over responsibility for a building, you inherit its TM44 obligations. If the previous owner or manager held a valid certificate, that certificate transfers with the building and remains valid until its expiry date. If no valid certificate exists, arranging an inspection becomes your immediate responsibility. Always request TM44 documentation during the acquisition process and verify the certificate’s status on the national register. Inheriting a compliance gap doesn’t excuse you from enforcement action.

I’m a tenant — is TM44 my responsibility or my landlord’s?

The answer depends on your lease terms and who has operational control of the air conditioning systems. Generally, the party responsible for maintaining and operating the AC equipment is responsible for TM44 compliance. In a standard commercial lease where the landlord provides and maintains the air conditioning, they typically bear responsibility. However, if you’ve installed your own AC equipment or your lease places maintenance obligations on you, the responsibility may be yours. Check your lease carefully and clarify this with your landlord — don’t assume someone else is handling it.

My AC system was installed recently — when is my first inspection due?

New systems exceeding the 12kW threshold require their first TM44 inspection within five years of installation. There’s no exemption for new equipment, even though recently installed systems are likely to be operating efficiently. The inspection still provides value by establishing a baseline for future comparisons and verifying that the installation matches the building’s requirements. Many building managers choose to commission their first inspection sooner than the five-year deadline to identify any early-life issues.

Practical Questions About Your TM44 Certificate

How do I check if my TM44 certificate is registered?

All valid TM44 certificates must be lodged on the national register maintained by government. You can search this register using your certificate reference number or building address to verify that your certificate appears correctly. If your certificate isn’t registered, it’s not legally valid — this sometimes occurs with unaccredited inspectors who lack the authority to lodge certificates. When I complete your inspection, I lodge the certificate immediately and provide you with confirmation of the registration reference.

What areas does AirCert cover?

I provide TM44 inspection help across the entire North East of England and Yorkshire, operating from my base in Middlesbrough. This includes Newcastle, Sunderland, Durham, Darlington, Teesside, York, Leeds, Sheffield, and all surrounding areas. For multi-site businesses with premises outside this core region, I can often accommodate additional locations as part of a portfolio arrangement. Distance isn’t usually a barrier — contact me with your requirements and I’ll confirm coverage and provide a quote. [INTERNAL LINK: coverage-area]

[META: TM44 inspection FAQ — answers to common questions about TM44 certificates, legal requirements, costs and what to expect. Expert guidance from AirCert.]