TM44 is a particular type of inspection that assesses the performance and efficiency of the air conditioning systems of a building. Its main purpose is to ensure the adequacy of the system for the building and reduce energy efficiency and carbon footprint.
TM44 is outlined in Energy Performance of Building Regulations 2007 and is designed to implement the European Union’s Energy Performance of the Building Directive (EPBD).
However, this does not mean that every air conditioning system in the UK is subject to TM44 inspection, which we will discuss in detail here. We will also elaborate on the process, regulations, and importance of this inspection. But let’s begin with the components of the system that are inspected during the TM44 inspection.
What are the Key Elements of a TM44 Inspection?
TM44 inspection is a thorough process that includes every aspect, from assessment to recommendation and more. Here are the key elements of the inspection:
System Assessment
The inspection involves a detailed evaluation of the system, including its type, efficiency, design requirement and control. It will also check the cooling demands of the building and compare it with the installed system to ensure it is of proper size to maintain energy efficiency.
Maintenance and Operation
The inspection also checks whether the system is being maintained and operated in an energy-efficient manner. It will also check for issues that can reduce the energy efficiency of the system, such as blocked ducts and dirty filters.
Recommendations
TM44 inspection also includes a complete report that comes with recommendations to improve the functionality and energy efficiency of the system. These recommendations may include adjustments, upgrades and changes to its operation or maintenance.
Compliance
The system is also checked for its code compliance with all the relevant standards and regulations. Building managers or owners should have a complete report on the subject to present to the authorities when requested.
Which Systems are Inspected in a TM44 Inspection?
Below is the detail of the systems that are checked during the inspection:
1. System Overview
- System Type: The type of air conditioning system is assessed, e.g., central systems, split units, chillers, and VRV/VRF systems.
- System Size and Capacity: The overall size and capacity of the system are assessed to ensure it is not oversized or undersized for the building’s needs.
2. Refrigerant Circuit
- Refrigerant Type: The type of the refrigerant is identified to ensure it is compliant with the regulations.
- Refrigerant Charge: The level of refrigerant is also checked to ensure it is at optimal level and not overcharged or undercharged.
- Leak Detection: The system is then checked for any signs of refrigerant leaks, which can reduce performance and harm the environment.
3. Air Handling Units (AHUs)
- Filters: The overall condition of air filters is checked to ensure they are not clogged, damaged or dirty.
- Coils: Condenser and evaporative coils are inspected for debris or damage, which can badly hamper the performance of the heat exchanger.
- Fans and Motors: The condition and performance of fans and motors are checked to see if they are properly functioning.
4. Controls and Settings
- Thermostats: The assessor checks the calibration, placement and settings of thermostats to ensure they are properly controlling the system.
- Timers and Schedulers: The settings of timers and schedulers are checked to see whether they are set for energy efficiency.
- Zoning: If the system uses zoning, the system is checked to ensure it is properly configured to avoid excessive energy usage for unused areas.
5. Ductwork
- Insulation: Ductwork’s insulation is thoroughly inspected for its overall condition to ensure it is not causing energy losses.
- Leakage: The ductwork is also checked for any signs of leakage, which can reduce the system’s efficiency.
- Airflow: The airflow in the ducts is checked to ensure it is balanced and meets design specifications.
6. Cooling and Heating Equipment
- Chillers: If the chillers are included in the system, they are checked for maintenance, efficiency, and operation.
- Condensers: The condition of the condenser is thoroughly evaluated to ensure its optimum performance.
- Heat Exchangers: Heat exchangers are inspected for damage or fouling, which can reduce efficiency.
How is TM44 Inspection Carried Out?
TM44 inspection follows a detailed process, checking every component of the hardware and software of the system. Here is a detailed process of TM44 inspection:
Pre-Inspection Preparation
This step includes the evaluation of the system and all the relevant paperwork to understand the upcoming challenge. This generally includes the assessment of the following:
- Maintenance records
- Building plans
- System specifications
- System’ age
- Usage patterns
On-Site Inspection
Once the preliminary checks are complete, the assessor goes on to thoroughly examine the air conditioning system. This includes the detailed inspection of all the components that we have discussed before. This step includes the following:
- A complete system assessment
- Efficiency evaluation
- Evaluation of controls and settings
- Maintenance and operation checks
Data Collection and Analysis
After the assessment, all the data is collected and thoroughly assessed to identify any shortcomings and potential areas of improvement. It includes the analysis of:
- System’s performance
- Energy usage
- Operational patterns
- Cooling output
Report Preparation
Once the inspection and analysis are complete, the assessor will prepare a complete report that includes all the details on the following:
- System Overview
- Findings
- Recommendations
- Compliance
Post-Inspection Actions
After the report is prepared, the owner or the manager of the building is responsible for implementing the recommendations to increase the system’s efficiency. Moreover, the report must be kept safely and made available to the relevant authorities upon their request.
Why TM44 inspection is Important?
A TM44 inspection is important for several reasons, ranging from legal compliance to environmental and financial benefits. Here’s a detailed explanation of why it matters:
Legal Compliance
TM44 inspection is mandatory for buildings with more than 12kW air conditioning output. If failed to comply, it can result in penalties of up to £300 per building.
Energy Efficiency
The inspection will help identify inefficiencies and address them promptly to reduce energy consumption and improve energy efficiency.
Cost Savings
Improving the efficiency of the system, a TM44 inspection will help you save a substantial amount on energy bills. It will also reduce repair costs by identifying potential problems early.
Environmental Impact
By optimising the performance of the air conditioning system, you can reduce your overall carbon footprint and contribute to the global climate goals.
Maintenance and Longevity
A TM44 inspection allows you to carry out proactive and preventive maintenance, keeping the system in optimal condition and improving its longevity.
Building Value and Reputation
A timely TM44 inspection demonstrates your commitment to energy efficiency and improves the value of your building.
What are the Legal Requirements for a TM44 Inspection in the UK?
Check the legal requirements that are postulated below for aTM44 Inspection in the UK:
System Requirements
Your air conditioning system must have an output of more than 12kW, or the cumulative output of the air conditioning systems of the building should be above 12kW for the TM44 inspection.
Frequency of Inspection
For the eligible air conditioning systems, the regulations mandate a TM44 inspection every 5 years. This applies to both single 12kW systems and smaller systems with cumulative output over 12kW. Moreover, for systems with over 250kW output, the first inspection must be executed within 1 year of their installation.
Responsibilities
The building manager or the owner is responsible for ensuring the inspection is carried out within the required timeframe. Furthermore, only an accredited energy assessor is eligible to carry out a TM44 inspection.
Inspection Report
After the inspection, a detailed report must be prepared and provided by the assessor, which should be kept by the owner or the building manager and presented to the authorities when requested.
Penalties
In case of failure to comply with the requirements, local authorities can issue a fine of £300 for every building. If you do not carry out the inspection within the next 7 days, they can fine you with an additional £200.
Exemptions
All air conditioning systems with output less than 12kW or buildings with cumulative AC output of less than 12kW are exempted. Moreover, temporary cooling systems are also not subject to a TM44 inspection.
How much does a TM44 Inspection Cost?
The cost of a TM44 inspection significantly varies depending on several factors, such as:
- Complexity of the air conditioning system
- On-site requirement of the equipment
- Size and capacity of the system
Keeping these parameters in mind, a TM44 inspection can cost you anywhere between £600 and £1500.
If you are looking for a qualified and accredited assessor near you for a TM44 inspection of your building’s air conditioning system, you can contact KTIC. We offer high-end inspections at highly competitive prices around the UK.
