TM44 Air Conditioning Inspections

Ensure compliance, optimise efficiency and reduce energy costs.

A TM44 inspection is a legal requirement for any building owner or manager responsible for air conditioning systems with an effective rated output of 12kW or more. Complying with TM44 requirements ensures your systems operate efficiently while remaining compliant with UK regulations.

Our TM44 service includes a full inspection of your existing air conditioning system(s) by an accredited assessor. We assess system efficiency, identify faults and provide clear, practical advice on how to improve performance and reduce operating costs. Following the inspection, you will receive a detailed report outlining findings and next-step recommendations, including estimated costs and projected return on investment.

Not only does our TM44 inspection service help your organisation avoid legal penalties, it also provides valuable data to support energy management, reduce consumption and accelerate your net zero targets.

  • Optimise air conditioning system efficiency

  • Understand costs and ROI of upgrades and improvements

  • Avoid financial penalties

  • Maintain compliance with air conditioning standards

Get a quote
Understand your obligations and stay compliant

Requirements, compliance and benefits

TM44 compliance is a legal requirement for air conditioning systems with an effective rated output of 12kW or more, and must be met every five years in line with TM44 requirements. A TM44 inspection applies to both commercial and residential properties, including systems made up of multiple units below 12kW where the combined output exceeds 12kW.

These regulations cover a wide range of environments, including offices, schools, healthcare settings, retail spaces and public buildings. For organisations managing multiple sites or large estates, maintaining up-to-date TM44 compliance is essential to ensure operational continuity and reduce risk. Taking a proactive approach to TM44 requirements enables efficient planning, minimises disruption and supports wider energy management strategies.

Air conditioning systems can have a significant environmental impact if not properly managed. The refrigerants used in these systems can be thousands of times more damaging than carbon dioxide.

This is because chemicals such as Hydrofluorocarbons (HFCs), commonly used for cooling, have a Global Warming Potential (GWP) far greater than CO₂ if they leak. A TM44 inspection plays a critical role in identifying potential risks, ensuring systems are functioning correctly and reducing environmental impact.

Regular TM44 compliance helps you manage these risks proactively, improving both environmental performance and operational efficiency.

Trading Standards can issue fines of £500 per building if a valid TM44 inspection report cannot be provided within seven days of request.

However, the risks extend beyond financial penalties. Failure to meet TM44 requirements can result in increased regulatory scrutiny and missed opportunities to improve system efficiency.

Without undertaking a TM44 inspection, organisations may lack the insight needed to identify inefficiencies, meaning higher energy consumption and operational costs.

By maintaining up-to-date TM44 compliance, organisations can reduce risk, improve system performance and lower operating costs.

Our service delivers a comprehensive review of your air conditioning systems to ensure compliance with TM44 requirements while identifying opportunities for improvement.

During a TM44 inspection, our accredited assessors evaluate system efficiency and performance, including refrigeration equipment and air and water movement systems.

We also assess system controls to understand how they are used in practice, identifying faults, inefficiencies and unnecessary energy use. This structured TM44 process ensures compliance while optimising performance.

The final report provides a clear overview of system performance, with actionable insights to support maintenance strategies, capital investment and long-term energy planning.

Key features and benefits

Reduce operating & maintenance costs

A TM44 inspection examines the key components that influence system performance, including refrigeration, airflow, water systems and associated controls.

The resulting recommendations are designed to improve efficiency, reduce electricity consumption and lower carbon emissions. By acting on these insights, organisations can decrease both operating and maintenance costs while improving reliability and system lifespan.

Improve energy efficiency and performance

Air conditioning systems are often a significant contributor to overall energy use. A well-managed TM44 programme helps ensure systems are running efficiently and not consuming unnecessary energy.

By identifying inefficiencies early, organisations can take targeted action to optimise performance, reduce waste and improve the overall energy profile of their buildings.

Our value-added service

We go beyond the standard compliance report. Our TM44 service provides a clear overview of your cooling systems by analysing energy data usage and refrigerant quantities for each system on site. We project energy consumption and operating costs at both system and site level, giving you a strong understanding of performance.

You’ll also gain clear insight into implementation costs and potential savings, identifying systems that are under-sized or oversized, and inefficient systems that may require upgrade or replacement.

Support sustainability and net zero goals

Reducing energy consumption and improving system efficiency plays an important role in achieving sustainability targets.

Our TM44 inspection service supports your organisation’s wider environmental strategy by helping to lower carbon emissions, reduce reliance on inefficient systems and contribute to long-term net zero objectives.

Why choose Zenergi for TM44 inspections?

Organisations choose Zenergi because they need a partner who can deliver more than compliance alone. They need expertise, reliability and a service that adds value beyond the inspection itself.

Our teams combine technical knowledge, data insight and practical experience across a wide range of sectors, including public sector, education, commercial and multi-site organisations.

By working with Zenergi, you benefit from experienced and accredited assessors who deliver a consistent and reliable TM44 service. You’ll receive clear, actionable recommendations that support informed decision-making, along with expert guidance that aligns compliance with your wider energy and cost-saving objectives.

We understand the challenges of managing complex estates and work with you to ensure your TM44 inspection programme is delivered efficiently and with minimal disruption.

Simple, end-to-end support for compliance

How we support you

Our approach is designed to make compliance straightforward and efficient. We plan and schedule your TM44 inspection to minimise disruption, while gathering and analysing key system data. Following a thorough on-site inspection, we provide a clear, compliant report with actionable recommendations and support you in understanding your results and next steps. This ensures your TM44 compliance is maintained while helping you unlock additional value from your inspection.

Our team of accredited experts is here to help you meet your TM44 requirements.

Speak to an expert today or book your TM44 inspection to ensure your compliance is up to date.

Get in touch
Resources

Related resources

View all
Webinar
Webinar recording: Navigating energy market volatility
Report
Monthly Market Report: March 2026
Webinar
Webinar recording: Protecting water and your budget
Report
Monthly Market Report: February 2026
Guide
Join our next Zen Hybrid gas basket for schools
Report
Monthly Market Report: January 2026
Webinar
Webinar recording: Market-wide Half Hourly Settlement
Report
Monthly Market Report: December 2025

You might also be interested in

TM44 Air Conditioning Inspections v2

Energy Savings Opportunity Scheme

Streamlined Energy and Carbon Reporting

Energy Performance Certificates

Minimum Energy Efficiency Standards

Display Energy Certificates (DECS) for Commercial Businesses

Carbon Border Adjustment Mechanism

TM44 Air Conditioning Inspections v2

Energy Savings Opportunity Scheme

Streamlined Energy and Carbon Reporting

Energy Performance Certificates

Minimum Energy Efficiency Standards

Display Energy Certificates (DECS) for Commercial Businesses

Carbon Border Adjustment Mechanism

TM44 Air Conditioning Inspections v2

Energy Savings Opportunity Scheme

Streamlined Energy and Carbon Reporting

Energy Performance Certificates

Minimum Energy Efficiency Standards

Display Energy Certificates (DECS) for Commercial Businesses

Carbon Border Adjustment Mechanism

TM44 Air Conditioning Inspections v2

Energy Savings Opportunity Scheme

Streamlined Energy and Carbon Reporting

Energy Performance Certificates

Minimum Energy Efficiency Standards

Display Energy Certificates (DECS) for Commercial Businesses

Carbon Border Adjustment Mechanism

TM44 Air Conditioning Inspections v2

Energy Savings Opportunity Scheme

Streamlined Energy and Carbon Reporting

Energy Performance Certificates

Minimum Energy Efficiency Standards

Display Energy Certificates (DECS) for Commercial Businesses

Carbon Border Adjustment Mechanism

TM44 Air Conditioning Inspections v2

Energy Savings Opportunity Scheme

Streamlined Energy and Carbon Reporting

Energy Performance Certificates

Minimum Energy Efficiency Standards

Display Energy Certificates (DECS) for Commercial Businesses

Carbon Border Adjustment Mechanism

TM44 Air Conditioning Inspections

Our accredited assessors will carry out a comprehensive inspection to review the efficiency of your system, check for faults and provide advice on how to make it more cost effective to run. We’ll ensure you’re compliant with regulations and provide a full report, detailing findings and next stage recommendations.

Find out more

Energy Savings Opportunity Scheme

Our comprehensive service manages the entire process, from data collection to reporting. With energy and carbon analysts calculating energy consumption and identifying areas for improvement, and registered and qualified lead assessors on hand, you can achieve compliance, while improving energy efficiency and reducing costs.

Find out more

Streamlined Energy and Carbon Reporting

We take care of the collation, calculations and reporting of energy consumption and carbon emissions for Scopes 1, 2 and 3. Our service not only ensures compliance, but also helps identify energy efficiency measures that reduce greenhouse gas emissions.

Find out more

Energy Performance Certificates

Ensuring a good energy rating is critical in an increasingly competitive real-estate environment. Our service offers a strategic approach to enhance the rental and saleable value of your buildings while meeting regulatory compliance.

Find out more

Minimum Energy Efficiency Standards

Our comprehensive service manages your route to an Asset Rating of B for all your properties by 2030. We take care of the whole process from survey through to identifying and implementing cost-effective improvements to enhance the EPC rating, increase property value, and ensure compliance.

Find out more

Display Energy Certificates

We all have a responsibility to reduce our energy use, which is why our service identifies opportunities to improve the energy efficiency of your buildings, while navigating compliance with ease.

Find out more

Carbon Border Adjustment Mechanism

Our CBAM support service helps you understand, comply with, and adapt to these regulatory changes, ensuring your products meet the requirements for CBAM compliance.

Find out more

TM44 Air Conditioning Inspections

Our accredited assessors will carry out a comprehensive inspection to review the efficiency of your system, check for faults and provide advice on how to make it more cost effective to run. We’ll ensure you’re compliant with regulations and provide a full report, detailing findings and next stage recommendations.

Find out more

Energy Savings Opportunity Scheme

Our comprehensive service manages the entire process, from data collection to reporting. With energy and carbon analysts calculating energy consumption and identifying areas for improvement, and registered and qualified lead assessors on hand, you can achieve compliance, while improving energy efficiency and reducing costs.

Find out more

Streamlined Energy and Carbon Reporting

We take care of the collation, calculations and reporting of energy consumption and carbon emissions for Scopes 1, 2 and 3. Our service not only ensures compliance, but also helps identify energy efficiency measures that reduce greenhouse gas emissions.

Find out more

Energy Performance Certificates

Ensuring a good energy rating is critical in an increasingly competitive real-estate environment. Our service offers a strategic approach to enhance the rental and saleable value of your buildings while meeting regulatory compliance.

Find out more

Minimum Energy Efficiency Standards

Our comprehensive service manages your route to an Asset Rating of B for all your properties by 2030. We take care of the whole process from survey through to identifying and implementing cost-effective improvements to enhance the EPC rating, increase property value, and ensure compliance.

Find out more

Display Energy Certificates

We all have a responsibility to reduce our energy use, which is why our service identifies opportunities to improve the energy efficiency of your buildings, while navigating compliance with ease.

Find out more

Carbon Border Adjustment Mechanism

Our CBAM support service helps you understand, comply with, and adapt to these regulatory changes, ensuring your products meet the requirements for CBAM compliance.

Find out more

TM44 Air Conditioning Inspections

Our accredited assessors will carry out a comprehensive inspection to review the efficiency of your system, check for faults and provide advice on how to make it more cost effective to run. We’ll ensure you’re compliant with regulations and provide a full report, detailing findings and next stage recommendations.

Find out more

Energy Savings Opportunity Scheme

Our comprehensive service manages the entire process, from data collection to reporting. With energy and carbon analysts calculating energy consumption and identifying areas for improvement, and registered and qualified lead assessors on hand, you can achieve compliance, while improving energy efficiency and reducing costs.

Find out more

Streamlined Energy and Carbon Reporting

We take care of the collation, calculations and reporting of energy consumption and carbon emissions for Scopes 1, 2 and 3. Our service not only ensures compliance, but also helps identify energy efficiency measures that reduce greenhouse gas emissions.

Find out more

Energy Performance Certificates

Ensuring a good energy rating is critical in an increasingly competitive real-estate environment. Our service offers a strategic approach to enhance the rental and saleable value of your buildings while meeting regulatory compliance.

Find out more

Minimum Energy Efficiency Standards

Our comprehensive service manages your route to an Asset Rating of B for all your properties by 2030. We take care of the whole process from survey through to identifying and implementing cost-effective improvements to enhance the EPC rating, increase property value, and ensure compliance.

Find out more

Display Energy Certificates

We all have a responsibility to reduce our energy use, which is why our service identifies opportunities to improve the energy efficiency of your buildings, while navigating compliance with ease.

Find out more

Carbon Border Adjustment Mechanism

Our CBAM support service helps you understand, comply with, and adapt to these regulatory changes, ensuring your products meet the requirements for CBAM compliance.

Find out more

TM44 Air Conditioning Inspections

Our accredited assessors will carry out a comprehensive inspection to review the efficiency of your system, check for faults and provide advice on how to make it more cost effective to run. We’ll ensure you’re compliant with regulations and provide a full report, detailing findings and next stage recommendations.

Find out more

Energy Savings Opportunity Scheme

Our comprehensive service manages the entire process, from data collection to reporting. With energy and carbon analysts calculating energy consumption and identifying areas for improvement, and registered and qualified lead assessors on hand, you can achieve compliance, while improving energy efficiency and reducing costs.

Find out more

Streamlined Energy and Carbon Reporting

We take care of the collation, calculations and reporting of energy consumption and carbon emissions for Scopes 1, 2 and 3. Our service not only ensures compliance, but also helps identify energy efficiency measures that reduce greenhouse gas emissions.

Find out more

Energy Performance Certificates

Ensuring a good energy rating is critical in an increasingly competitive real-estate environment. Our service offers a strategic approach to enhance the rental and saleable value of your buildings while meeting regulatory compliance.

Find out more

Minimum Energy Efficiency Standards

Our comprehensive service manages your route to an Asset Rating of B for all your properties by 2030. We take care of the whole process from survey through to identifying and implementing cost-effective improvements to enhance the EPC rating, increase property value, and ensure compliance.

Find out more

Display Energy Certificates

We all have a responsibility to reduce our energy use, which is why our service identifies opportunities to improve the energy efficiency of your buildings, while navigating compliance with ease.

Find out more

Carbon Border Adjustment Mechanism

Our CBAM support service helps you understand, comply with, and adapt to these regulatory changes, ensuring your products meet the requirements for CBAM compliance.

Find out more

TM44 Air Conditioning Inspections

Our accredited assessors will carry out a comprehensive inspection to review the efficiency of your system, check for faults and provide advice on how to make it more cost effective to run. We’ll ensure you’re compliant with regulations and provide a full report, detailing findings and next stage recommendations.

Find out more

Energy Savings Opportunity Scheme

Our comprehensive service manages the entire process, from data collection to reporting. With energy and carbon analysts calculating energy consumption and identifying areas for improvement, and registered and qualified lead assessors on hand, you can achieve compliance, while improving energy efficiency and reducing costs.

Find out more

Streamlined Energy and Carbon Reporting

We take care of the collation, calculations and reporting of energy consumption and carbon emissions for Scopes 1, 2 and 3. Our service not only ensures compliance, but also helps identify energy efficiency measures that reduce greenhouse gas emissions.

Find out more

Energy Performance Certificates

Ensuring a good energy rating is critical in an increasingly competitive real-estate environment. Our service offers a strategic approach to enhance the rental and saleable value of your buildings while meeting regulatory compliance.

Find out more

Minimum Energy Efficiency Standards

Our comprehensive service manages your route to an Asset Rating of B for all your properties by 2030. We take care of the whole process from survey through to identifying and implementing cost-effective improvements to enhance the EPC rating, increase property value, and ensure compliance.

Find out more

Display Energy Certificates

We all have a responsibility to reduce our energy use, which is why our service identifies opportunities to improve the energy efficiency of your buildings, while navigating compliance with ease.

Find out more

Carbon Border Adjustment Mechanism

Our CBAM support service helps you understand, comply with, and adapt to these regulatory changes, ensuring your products meet the requirements for CBAM compliance.

Find out more

TM44 Air Conditioning Inspections

Our accredited assessors will carry out a comprehensive inspection to review the efficiency of your system, check for faults and provide advice on how to make it more cost effective to run. We’ll ensure you’re compliant with regulations and provide a full report, detailing findings and next stage recommendations.

Find out more

Energy Savings Opportunity Scheme

Our comprehensive service manages the entire process, from data collection to reporting. With energy and carbon analysts calculating energy consumption and identifying areas for improvement, and registered and qualified lead assessors on hand, you can achieve compliance, while improving energy efficiency and reducing costs.

Find out more

Streamlined Energy and Carbon Reporting

We take care of the collation, calculations and reporting of energy consumption and carbon emissions for Scopes 1, 2 and 3. Our service not only ensures compliance, but also helps identify energy efficiency measures that reduce greenhouse gas emissions.

Find out more

Energy Performance Certificates

Ensuring a good energy rating is critical in an increasingly competitive real-estate environment. Our service offers a strategic approach to enhance the rental and saleable value of your buildings while meeting regulatory compliance.

Find out more

Minimum Energy Efficiency Standards

Our comprehensive service manages your route to an Asset Rating of B for all your properties by 2030. We take care of the whole process from survey through to identifying and implementing cost-effective improvements to enhance the EPC rating, increase property value, and ensure compliance.

Find out more

Display Energy Certificates

We all have a responsibility to reduce our energy use, which is why our service identifies opportunities to improve the energy efficiency of your buildings, while navigating compliance with ease.

Find out more

Carbon Border Adjustment Mechanism

Our CBAM support service helps you understand, comply with, and adapt to these regulatory changes, ensuring your products meet the requirements for CBAM compliance.

Find out more

Our experience

View all

Annual saving of £61,000+ and immediate ROI from TM44 A/C Inspection.

Discover how a global data centre accessed major operational savings and maintained compliance.

Saving from cleaning the chillers
£
40,000+
Saving from adjusting the schedules
£
21,000+
Saving from upgrading the chillers
£
337,000+

How we found savings of more than 25% for Cheam Fields Primary Academy

A TM44 air conditioning inspection revealed key energy-saving opportunities for this Sutton school, cutting costs by 25% and ensuring compliance.

Annual A/C operating cost
£
15,292
Annual saving of largest opportunity
£
4,003

How Westbrook Lane Primary School halved air conditioning system costs.

Zenergi’s TM44 Air Conditioning Inspection helped reduce A/C system costs by 50%, delivering tangible financial and environmental benefits for the school.

Annual A/C system operational cost
£
6,952
Potential global warming equivalent
17
tCO2e
Average system Energy Efficiency Ratio (EER)
27
(D)

Partnering with PR Associates to drive compliance and energy efficiency in schools.

We’re helping to ensure over 100 schools have the confidence to focus on their priorities – all while remaining compliant and optimising efficiency.

Simon Watts

Partnerships Manager

Zenergi

Shropshire Council: Enabling compliance for over 10 years.

We’re helping Shropshire Council to achieve compliance through Display Energy Certificates and progressively reduce its environmental footprint. Zenergi is also enabling targeted energy reduction in key buildings.

Darren Myers

Carbon Compliance Manager

Zenergi

Keeping energy costs under control for MK2 Real Estate

Discover how strategic procurement and ongoing oversight supports a growing property portfolio.

Mark Leonard

Strategic Client Partner

Zenergi

ESOS audit identifies £4 million in cost savings.

Explore how our ESOS Phase 3 audit uncovered a 5% energy reduction and a two-year ROI for a FTSE 250 food and drink manufacturer.

Energy reduction
33,093 MWh
Cost savings
£4.1 million
Carbon reduction
6,219
tCO2e

Unlocking £5 million in savings with ESOS compliance

How a global renewable energy leader turned ESOS into a strategic opportunity for efficiency and sustainability.

Energy savings
26,000,000 kWh
Carbon reduction
8,300 tCO₂e
Cost savings
£4.91 million

Powering a historic dining hall for St John’s School.

Our Siteworks team streamlined a complex meter installation to meet ambitious timescales and ensure a new dining hall opened on time.

Karina Joshi

Strategic Customer Success Manager

St John's School Customer Success Manager

Bill Validation case study for independent school

How one conversation led to a £107,000 refund for a leading independent boarding school

Billy Pryke

Strategic Customer Success Manager

How our energy audit identified savings of £50,000 for E-ACT.

Discover how our exciting new programme for Multi-Academy Trust, E-ACT, identified huge carbon and cost savings in just six months.

Identified energy savings
246,193
kWh
Identified carbon savings
48.16
tCO2e
Identified cost savings
£
50,114

Greener transport: helping Gregory Group meet ambitious goals.

A science-led partnership with one of the UK’s largest transport groups that led to impressive net zero acceleration.

Harry Eaves

Senior Energy Consultant

Zenergi

Discover how our energy audits highlighted £94,955 of annual savings for Aldermore Bank.

We’re helping Aldermore Bank to reduce carbon emissions and cut costs – all while keeping the bank’s net zero strategy firmly on track.

Total carbon saving
172.6
tCO2e
Total annual cost saving
£
94,955

Leigh Academies Trust saves £500,000+ through flexible energy purchasing.

Discover how a 10+ year partnership helped one of the country’s largest and most established Multi-Academy Trusts navigate a turbulent energy market

Achieved savings: Year one
£
399,311
Forecast savings: Year two
£
200,287
Forecast savings: Year three
£
43,511

Future-proofing Reading Borough Council’s commercial properties to comply with 2030 energy efficiency targets.

We’re ensuring the council’s buildings comply with the Minimum Energy Efficiency Standard and working together to deliver a clear pathway to 2030.

John Netherwood

Chief Operations Officer

Zenergi

FAQs

A TM44 inspection is a mandatory energy assessment of air conditioning systems in buildings across the UK. It evaluates system efficiency, performance and compliance with TM44 requirements, helping organisations reduce energy use and operating costs.

A TM44 inspection is required by law for any building with air conditioning systems that have a combined effective rated output of 12kW or more. Inspections must be carried out at least every five years to remain compliant with TM44 requirements.

TM44 inspections must be completed every five years. Staying up to date ensures ongoing compliance and helps maintain efficient system performance.

TM44 requirements apply to all air conditioning systems with a combined output of 12kW or more. This includes multiple smaller units that together exceed this threshold, commonly found in offices, retail spaces, schools and healthcare facilities.

During a TM44 inspection, an accredited assessor reviews your air conditioning systems to assess efficiency, identify faults and evaluate controls. Zenergi’s service includes a detailed report with recommendations to improve performance and reduce energy consumption.

You will receive a comprehensive TM44 report outlining system performance, identified issues and practical recommendations. This often includes estimated costs, potential savings and return on investment for suggested improvements.

If you fail to provide a valid TM44 inspection report when requested, you may face a fine of £500 per building.

A TM44 inspection identifies inefficiencies, incorrect settings and underperforming systems. By addressing these issues, organisations can reduce energy consumption, lower energy bills and improve system lifespan.

TM44 inspections support sustainability by reducing energy usage and carbon emissions. They also identify systems that are oversized, supporting your organisation’s net zero targets.

TM44 inspections must be conducted by an accredited air conditioning energy assessor. Using a qualified professional ensures your inspection meets all TM44 requirements and is legally valid.

Quick links