TM44 Air Conditioning Inspections

How Much Does a TM44 Air Conditioning Inspection Cost?

TM44 air conditioning inspections typically cost between £250 and £1000 (ex VAT), depending on the system’s size, complexity, and location. Larger or multi-site properties may incur higher costs due to the need for additional time on site and more detailed reporting. An accredited energy assessor must carry out the inspection.

What Is a TM44 Air Conditioning Inspection?

A TM44 inspection is a mandatory energy efficiency assessment for air conditioning systems with a combined cooling output greater than 12 kW. It is required by law under the Energy Performance of Buildings Regulations and applies to systems in commercial buildings, including:

• Offices

• Retail spaces

• Hotels

• Schools and universities

• Public buildings

TM44 inspections aim to improve system efficiency, reduce energy consumption, and lower environmental impact.

Who Needs a TM44 Inspection?

Any UK business or building owner operating air conditioning systems with a total output over 12 kW must have a valid TM44 inspection report. This includes multiple smaller units that together exceed the 12 kW threshold.

Inspections must be carried out every 5 years, and failure to comply may result in penalties of £300 per offence.

What’s Included in a TM44 Inspection?

A TM44 inspection is more than just a compliance task—it’s an opportunity to improve energy performance and reduce operational costs. The assessment typically includes:

• Examination of system documentation and service history

• Inspection of indoor and outdoor AC equipment

• Assessment of system controls and zoning

• Review of maintenance procedures and schedules

• Evaluation of system sizing and suitability for its purpose

• Identification of energy-saving opportunities

• Issuance of a full TM44 compliance report

The final report includes recommendations to improve efficiency, cut emissions, and reduce running costs.

Why Are TM44 Inspections Important?

Besides being a legal requirement, TM44 inspections deliver real business benefits:

• Energy Savings: Identifying inefficient equipment and poor settings can lead to substantial cost reductions.

• Improved Comfort: Better system control can enhance comfort for staff, visitors, and customers.

• Regulatory Compliance: Avoid fines and meet environmental standards.

• Sustainability Goals: Support ESG reporting and carbon reduction targets.

• Reduced Downtime: Spot potential failures before they become costly breakdowns.

When Should You Book a TM44 Inspection?

You need a TM44 inspection if:

• Your building’s AC system is over 12kW

• It’s been more than 5 years since the last inspection

• You’ve added new AC units that push the total capacity over the 12kW threshold

• You’re preparing for compliance audits, lease renewals, or sustainability assessments

If you’re unsure whether you need an inspection, a professional assessor can help determine your system’s total capacity.

Summary

TM44 inspections are a legal obligation and a valuable tool for improving air conditioning efficiency across commercial properties. With rising energy prices and increasing sustainability demands, now is the time to ensure your systems are compliant, efficient, and well-maintained.

To recap, TM44 inspections:

• Are legally required for systems over 12 kW

• Must be completed every 5 years

• Can reduce energy use and running costs

• Help businesses stay compliant and environmentally responsible

Book Your TM44 Inspection Today

At MHL, we provide nationwide TM44 air conditioning inspections carried out by accredited energy assessors. Whether you manage a single site or a national portfolio, we deliver fast, reliable service and clear, actionable reporting.

Contact us today to schedule your inspection or request a competitive quote.