All air conditioning systems with an output greater than 12kW must undergo a TM44 inspection at intervals not exceeding five years.
In Scotland, this interval may be reduced to as little as three years if the system is assessed as poorly maintained or inefficient. 

This requirement applies not only to comfort cooling systems but also to those used for process applications, such as server rooms or communications rooms.

Where multiple smaller systems are installed within a building and the combined output exceeds 12kW, and all systems are under the control of a single person or organisation, they are considered as one system and are subject to inspection under the TM44 regulations.

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The TM44 Inspection involves several key stages:

Pre-Inspection: Collection of basic information such as equipment lists, maintenance records, site drawings, and system schematics.
 

On-Site System Inspection: Examination of representative samples of installed equipment and identification of potential energy-saving opportunities.
 

Evaluation of Maintenance Standards: Assessment of current maintenance practices against industry best practice.
 

Evaluation of Controls and System Set-Up: Review of control systems and overall system configuration.
 

Report Production: Preparation of a detailed report for the responsible person, including clear recommendations for improvement.

• Legal Compliance
  TM44 inspections are a legal requirement under the Energy Performance of Buildings Regulations (EPBR) for systems over 12kW.
  They help you avoid fines for non-compliance and demonstrate responsibility as a building owner or operator.
   
• Improved Energy Efficiency
  Inspections identify operational inefficiencies and suggest improvements to reduce energy consumption and carbon emissions.
   
• Cost Savings
  Low-cost or no-cost recommendations can significantly lower energy bills by reducing waste and improving system performance.
   
• Extended Equipment Lifespan
  Highlighting issues with maintenance or performance helps prevent breakdowns and prolongs the life of your equipment.
   
• Better System Performance
  Ensures systems are correctly configured and maintained, improving air quality and comfort for occupants.
   
• Improved Asset Management
  The detailed inspection report supports planning, budgeting, and facilities management, contributing to smarter decision-making.
   
• Environmental Responsibility
  TM44 inspections support sustainability goals, carbon reduction efforts, and demonstrate environmental commitment to stakeholders.