A TM44 inspection is a mandatory assessment of air conditioning systems with a combined cooling capacity exceeding 12kW within a single building under the owner's control. Inspections must be carried out by an accredited energy assessor every five years.

The purpose is to evaluate:

  • The efficiency of the system
  • The adequacy of sizing relative to the building’s needs
  • The condition and performance of components
  • Opportunities to improve energy efficiency

Following the inspection, a detailed report is issued outlining findings and recommendations.

We provide TM44 inspections across Suffolk, Norfolk & Hertfordshire and the wider East Anglia region, helping businesses remain compliant while improving energy efficiency and reducing operating costs.

What is a TM44 Air Conditioning Inspection?

A TM44 inspection is the UK’s standard method for assessing the efficiency and performance of air conditioning systems. Introduced under the Energy Performance of Buildings Regulations, TM44 inspections are designed to improve energy efficiency, reduce operational costs and support wider carbon reduction targets.
It ensures that systems are correctly sized, properly maintained and operating as efficiently as possible. A TM44 inspection helps you:

  • Meet legal compliance requirements
  • Reduce energy usage and running costs
  • Improve system performance
  • Lower carbon emissions

Who Needs a TM44 Inspection?

You must arrange a TM44 air conditioning inspection if:

  • Your combined system capacity is 12kW or greater
  • It has been more than five years since your last inspection

This applies to:

  • Offices
  • Retail premises
  • Warehouses
  • Public sector buildings

If you’re unsure, we can quickly confirm whether your system requires inspection.

TM44 Inspection Levels Explained

TM44 air conditioning inspections are categorised into two main assessment levels depending on the complexity of the cooling equipment installed in the building:

Level 3 Inspection:
Focuses on simpler, packaged cooling systems such as multiple split and multi-split systems typically found in offices and retail units.

Level 4 Inspection:
Required for properties containing more complex, centralised systems such as Air Handling Units (AHUs), chillers and large variable refrigerant flow (VRF/VRV) networks.

What Does a TM44 Inspection Include?

Our accredited TM44 assessors carry out a full system review, including:

System Survey

  • Refrigeration equipment
  • Air handling systems
  • Ventilation and airflow
  • Controls and control strategies

Documentation Review – We assess:

  • Manuals and system guides
  • Drawings and schematics
  • Commissioning records
  • Maintenance history

Performance & Efficiency Assessment

We evaluate how well your system is performing, including:

  • Whether it is correctly sized for the space
  • Overall energy efficiency
  • Effectiveness of controls
  • Opportunities to optimise performance

Many systems are found to be inefficient due to poor settings or changing usage — our inspection identifies practical improvements.

TM44 Report & Recommendations

You will receive a detailed TM44 report, including:

  • System performance assessment
  • Identified inefficiencies
  • Clear improvement recommendations
  • Energy-saving opportunities

This helps you not only comply with regulations but also reduce operational costs.

Accredited TM44 Energy Assessors

All our inspections are carried out by fully accredited energy assessors, registered with approved bodies such as BESCA. We deliver TM44 inspections across:

  • Suffolk
  • Norfolk
  • Hertfordshire
  • East Anglia

Why TM44 Compliance Matters

Regular TM44 inspections help you:

  • Stay legally compliant
  • Avoid penalties
  • Reduce energy costs
  • Extend equipment lifespan
  • Support sustainability goals

This helps you not only comply with regulations but also reduce operational costs.

TM44 Air Conditioning Inspection FAQs

Every 5 years for systems over 12kW.

You may face penalties and be non-compliant with UK regulations.

It depends on system size — typically a few hours to a full day.

In most cases, no — inspections are non-disruptive.

System performance, inefficiencies and recommendations to improve energy efficiency.

Only systems with a combined output of 12kW or more require inspection.

Book Your TM44 Inspection in Suffolk, Norfolk & Hertfordshire

Need a TM44 air conditioning inspection East Anglia? Contact our team today to book your TM44 inspection or request a free quote.