What to expect from your TM44 certificate and report

A TM44 certificate and report, also known as an Air Conditioning Inspection Report in the UK, are key components of the legal requirements for energy efficiency in buildings. Here’s what to expect:

Unsure about your current inspection?

Access the Government Central Register here

To view all valid and expired TM44 certificates and reports,

(listed as AC-CERT & AC-REPORT), for your postcode

As standard, ACOC provides enhanced reports utilising the Ace Wizard software, enabling end users to access significantly more comprehensive, detailed, and actionable data.

For more information regarding the enhanced report please click on the image below

- A site visit is required to inspect the comfort cooling equipment, adhering to the sampling requirements outlined in the EPBD Guidance
- The onsite inspection generally consists of non-invasive visual assessments. Nevertheless, further inspection will be necessary for specific equipment, including air handling units (AHUs) and units situated above the ceiling
- The inspection process includes capturing photographs of the cooling plants, their serviced areas, and any accompanying support documents.
- We collect all relevant information and evidence, ACOC LTD holds accreditation with Quidos
- As standard, ACOC provides enhanced reports utilising the Ace Wizard software, enabling end users to access significantly more comprehensive, detailed, and actionable data.
- You'll usually receive your inspection report and certificate within 1-2 working days, but the exact timeframe can vary. This is because the complexity and number of sites with installed equipment can increase the processing time, potentially up to 10 working days for larger projects.
- The report and certificate will be available as a PDF, accessible at any time through Find An Energy Certificate
The certificate is a formal acknowledgment that your air conditioning system has undergone the required inspection. It typically includes:
✅ The address of the building
✅ Details of the air conditioning system (e.g., size, type, and capacity)
✅ The date of inspection
✅ The date of the next inspection due
✅ The name of the accredited energy assessor who conducted the inspection
This certificate must be lodged on the Landmark Register and is legally required for building exceeding the 12kW threshold
The report is a detailed document outlining the findings of the inspection and recommendations for improving efficiency and reducing energy consumption. It generally covers:
System overview:
- Equipment details, cooling capacity, and design intent.
  Inspection findings:
- Overall condition of the system
- Maintenance practices and records
- Control settings and functionality
- Efficiency of the system
- Opportunities for improvement
  Recommendations:
- Operational improvements (e.g., better controls, maintenance)
- System upgrades (e.g., more efficient components)
- Potential for system replacement
  Energy efficiency advice:
- Tailored advice to reduce environmental impact and costs.
  Compliance statement:
- Confirms whether the system meets regulatory obligations.
- The TM44 report is not a pass/fail assessment—it identifies areas for improvement.
- It can help reduce energy costs by highlighting inefficiencies.
- The report is valid for 5 years from the inspection date.
- You must make the report and certificate available to building occupants or any potential buyers/tenants.
- You are under no obligation to implement any of the recommendations provided in the report.

The images shown below provide a brief example of the types of issues identified during a TM44 Air Conditioning Energy Assessment. They represent only a small snapshot of what a TM44 inspection can uncover.

A TM44 assessment evaluates the condition, efficiency, and compliance of air conditioning systems, identifying inefficiencies, maintenance issues, and opportunities to reduce energy consumption and operating costs. Each inspection results in a detailed report with clear, practical recommendations to support compliance and improve system performance.