TM44 Air Conditioning Inspection — Expert Assessment for Commercial Buildings

What Is a TM44 Air Conditioning Inspection?

A TM44 air conditioning inspection is a mandatory statutory assessment of your commercial building’s cooling systems, required under the Energy Performance of Buildings Regulations 2012. If your premises contain air conditioning with a combined effective rated output exceeding 12kW, you must have it assessed by an accredited energy assessor at least once every five years. AirCert provides our services across the North East and Yorkshire, holding dual Elmhurst Level 3 and Level 4 accreditation — the highest qualifications available for this work in England and Wales.

This requirement exists because commercial cooling systems are among the most energy-intensive installations in commercial buildings — and among the most frequently operated inefficiently. A properly conducted assessment identifies energy waste, highlights maintenance issues, and provides actionable recommendations that reduce your running costs. It is not a box-ticking compliance exercise but a genuine opportunity to improve your building’s energy performance.

TM44 Air Conditioning Inspection vs Routine Servicing — A Critical Difference

One of the most common misconceptions about these inspections is confusing it with standard servicing. These are entirely separate activities carried out by different specialists with different purposes.

Routine maintenance keeps equipment running — cleaning filters, checking refrigerant levels, testing components, replacing worn parts. Your HVAC maintenance contractor handles this. An air conditioning inspection assesses energy efficiency and regulatory compliance. It examines whether your system is appropriately sized, whether controls operate effectively, and whether opportunities exist to reduce energy consumption. Only accredited energy assessors like AirCert can conduct these inspections and issue valid certificates. Having a current maintenance contract does not satisfy the legal inspection requirement.

What Your TM44 Air Conditioning Inspection Covers

Every AirCert air conditioning inspection follows the full CIBSE TM44 methodology. The assessment begins before we arrive on site — we gather information about your building’s cooling requirements, the age and specification of installed systems, and how those systems are currently controlled and maintained. This preparatory stage ensures the on-site visit is focused and efficient.

The on-site TM44 air conditioning inspection covers:

• System sizing — whether installed cooling capacity matches actual demand, or whether the system is significantly oversized or undersized for the spaces it serves
• Component condition — cleanliness and state of filters, evaporator coils, condenser coils, and heat exchangers, all of which directly affect energy performance
• Control strategy — how the system responds to occupancy levels, ambient temperature, time schedules, and seasonal changes in cooling demand
• Maintenance records — evidence of regular professional servicing, fault rectification history, and any ongoing issues affecting system performance
• Refrigerant management — F-gas compliance documentation, leak testing records, and refrigerant charge verification
• Practical efficiency improvements — specific, actionable recommendations tailored to your installation and building circumstances

Why Level 4 Accreditation Matters for Your TM44 Air Conditioning Inspection

Not all inspection providers hold the same qualifications. Level 3 accreditation permits inspection of standard systems — split units, multi-splits, smaller VRF installations. Level 4 extends to complex installations including chiller-based central plant, large air handling units, and building management system-controlled multi-zone systems.

Many providers across the North East hold only Level 3 accreditation. If your building contains chiller plant or complex centralised cooling and your inspection certificate was issued by an L3-only assessor, that certificate is invalid — leaving you exposed to enforcement action despite believing you are compliant. AirCert’s dual L3 and L4 accreditation means every air conditioning inspection we carry out is legally valid regardless of system complexity.

Preparing for Your TM44 Air Conditioning Inspection

Good preparation ensures your inspection proceeds efficiently and produces the most useful recommendations. Before we arrive, gather the following:

1. Maintenance records from your servicing contractor for the past five years
2. Original commissioning documentation if available
3. System manuals and equipment specifications
4. Previous TM44 air conditioning inspection reports and certificates
5. Building floor plans showing equipment locations where available
6. Details of any system modifications or extensions since original installation

Arrange access to all equipment — rooftop units, plant rooms, ceiling voids, and any remote locations serving different building zones. Ensure someone with operational knowledge of the building is available during the process to answer questions about usage patterns and system behaviour.

TM44 Air Conditioning Inspection Duration and Timescales

For straightforward single-system buildings, expect the process to take one to two hours on site. Complex buildings with multiple systems may require a full day or more. Following the site visit, your certificate and report are typically issued within five working days.

For most sites, the inspection requires no shutdown of systems — we assess equipment while it is operational, which provides more accurate efficiency data than inspecting dormant systems. Where access to internal components requires temporary shutdown, we coordinate this with your facilities team to minimise disruption.

Case Study: TM44 Air Conditioning Inspection — Teesside Office Complex

A four-storey office complex on Teesside engaged AirCert for a TM44 inspection covering a 56kW VRF system with 24 indoor units across three floors, plus a separate 18kW split system in the server room.

The TM44 air conditioning inspection revealed significant coil fouling on one of the two outdoor VRF units from nearby ventilation exhaust — reducing heat rejection efficiency measurably. Three ceiling cassette units had blocked filters restricting airflow. Zone controls were operating inconsistently, with several areas running cooling simultaneously with perimeter heating. The server room system ran continuously at full capacity regardless of actual load variation.

The report from our TM44 air conditioning inspection contained twelve prioritised recommendations. Immediate actions — coil cleaning, filter servicing, controls optimisation — required modest investment but delivered payback within months through reduced energy consumption. The facilities manager used the report to secure capital budget for the higher-priority improvements and plan phased implementation of remaining recommendations over eighteen months.

Book Your TM44 Air Conditioning Inspection Today

Whether you manage a single office, a multi-floor commercial development, or a complex institutional facility, AirCert provides the systems inspection service that North East and Yorkshire businesses rely on. We offer fixed transparent pricing, same-week availability for most requirements, and the dual Elmhurst accreditation covering every system type you are likely to encounter.

Get in touch today for a no-obligation quote. We respond the same working day and can typically arrange your inspection within one to two weeks — sooner for urgent compliance requirements. For a full explanation of the legal framework behind the requirement, visit our complete guide to TM44 inspections.