TM44 air conditioning inspections: a must for UK businesses in 2026
Save costs
Saving money without changing existing systems
Lower Emissions
Reducing wasted energy saves money and lowers your footprint
Improve Perfomance
Temperature affects more than just staff comfort
Become Compliant
Ensure your site remains or becomes compliant
Mandatory TM44 Air Conditioning Inspection: ensure compliance & improve efficiency
Ensure your office meets its legal obligations under UK Energy Performance of Buildings Directive (EPBD) regulations with a compliant TM44 Air Conditioning Inspection. If your office building has air conditioning systems with a total effective rated cooling output over 12kW, a TM44 inspection by an accredited assessor is mandatory every five years. These assessments evaluate the efficiency of your systems and provide valuable recommendations for improvement.
Based in Ripley, we provide accredited TM44 inspection services for office managers and building operators across Derbyshire and surrounding areas. Our goal is to help you achieve compliance while identifying potential energy savings and operational improvements for your air conditioning systems.
Understanding your legal obligation
The requirement for TM44 inspection stems from the EPBD regulations and applies to any single or combined air conditioning system with a total cooling capacity exceeding 12kW under one operator's control. This threshold is easily reached in office environments - even a small office with three or four wall-mounted split units can exceed 12kW when combined.
Inspections must be repeated every five years, and failure to produce a valid report upon request can lead to financial penalties. It is the responsibility of the building owner or manager to ensure compliance.
Common TM44 issues in office buildings
Office environments present specific air conditioning challenges that TM44 inspections frequently identify:
- Multiple split units across different areas often result in inefficient zoning, with some areas overcooling while others remain too warm. This wastes energy and creates employee discomfort.
- Simultaneous heating and cooling can occur when different zones operate independently without coordination, driving up energy costs significantly.
- VRF/VRV systems may have been poorly commissioned, leading to zones that don't respond correctly to demand or thermostats that override central controls.
- Out-of-hours operation is common in offices where systems continue running long after staff have left, or start too early in the morning without actual occupancy justifying the cooling load.
- Inadequate maintenance routines mean filters become clogged, reducing efficiency and air quality, while refrigerant leaks go undetected for extended periods.
The TM44 inspection process
Our accredited assessors conduct thorough on-site inspections with minimal disruption to your office operations.
The process involves reviewing relevant system documentation (like maintenance logs and manuals), visually inspecting accessible plant and equipment (including indoor and outdoor units and controls), assessing system sizing against actual cooling loads, and evaluating current operation and maintenance regimes against best practices.
Clear reports & actionable advice
Following the inspection, you will receive a comprehensive TM44 report lodged on the official government register. This report details the assessment findings and provides clear, practical recommendations for improving energy efficiency.
Advice may cover operational adjustments such as optimising timer settings and temperature setpoints, maintenance enhancements to improve system performance, or potential system upgrades, often with estimated energy and cost savings. For office buildings, simple changes like adjusting zone controls or scheduling systems to match actual occupancy can deliver immediate reductions in energy bills.
Benefits beyond compliance
While TM44 inspections are mandatory, they offer significant benefits for office operators. The impartial report identifies genuine opportunities to reduce energy consumption and lower operational costs.
Implementing recommendations can also lead to a reduced carbon footprint, improved system reliability, better workplace comfort for employees, and potentially extend the lifespan of your equipment through optimised operation and maintenance.
Meet your legal obligations
Stay fully compliant with the UK EPBD air conditioning regulations to avoid potential penalties and demonstrate responsible energy management. Compliance is essential for legal property transactions or leases and positions your business as a responsible operator in the built environment.
Identify energy and cost savings
Benefit from expert, impartial advice that highlights specific ways to reduce your office air conditioning energy use. By improving system efficiency, you can significantly lower operational costs and receive clear estimates of your potential financial savings. In office environments, poorly configured zoning and out-of-hours operation are two of the biggest sources of wasted energy.
Improve system performance
Understand how well your current systems are performing and where there's room for improvement. Enhancing maintenance practices and system controls can improve reliability and occupant comfort while ensuring long-term efficiency. Better climate control in your office environment contributes directly to employee wellbeing and productivity.
Support your sustainability goals
Reduce your carbon footprint and align with environmental responsibility goals. You'll receive practical guidance on sustainable cooling strategies that help you operate more efficiently and reduce environmental impact without compromising employee comfort or business operations.
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