TM44 Air Conditioning Energy Assessments 

TM44 Air conditioning energy assessments in London, Surrey, Sussex & Kent 

It is now a legal requirement for an air conditioning energy assessment. An air conditioning energy assessment is often called a TM44 air conditioning energy inspection.


What criterion makes me TM44 air conditioning energy assessment compliant?

All installed air conditioning systems with an effective rated output of more than 12.0kW must be regularly inspected by an energy assessor. The inspections must be no more than 5 years apart.


Regulations require the first inspection of the affected air conditioning systems to be carried out as follows:


- From January 2008, all installed air conditioning systems over 12.0kW must have an air conditioning inspection carried out within 5 years of commissioning.

- For other air conditioning systems where the output is more than 250.0kW the first inspection must have taken place by 4th January 2009.

- For other air conditioning systems where the effective rated output is more than 12.0kW the first inspection must have taken place before 4thJanuary 2011.

Systems that require an air conditioning energy inspection

Only air conditioning systems with an effective rated output of more than 12.0kW are affected by these regulations. This includes systems consisting of individual units which are less than 12.0kW but whose combined effective rated output is more than 12.0kW.   


The effective rated output is the maximum calorific output in kW stated by the manufacturer of the system as deliverable during continuous operation while complying with the useful efficiency indicated by the manufacturer.


One or more air conditioning units within a building that are controlled by a single person are considered to comprise a single air conditioning system for the purposes of regulations. The person who controls the operation of the system is the person who controls the technical functioning of the system, not someone who can just adjust the temperature or whose only responsibility is to adjust the controls.


In the case of all the air conditioning equipment being under 5 years old an assessment is not required.  However if there is a mixture of old and new equipment on site then an energy assessment must be carried out and registered as a legal requirement.


What does the air conditioning energy assessment cover?

A TM44 air conditioning energy inspection report is to give building owners and operators information about the performance of their air conditioning system(s) and plant, and to identify opportunities to save energy and cut operating costs.


The report identifies any operating anomalies, low and no cost savings and capital investment opportunities as well as the size and effectiveness of the plant installed in relation to cooling loads, and, an examination of the current maintenance regimes.


The air conditioning inspection consists of examination of the following where applicable; system documentation, refrigeration plant, heat rejection equipment, waterborne cooling and air conditioning systems, air handling units and duct work, outdoor air inlets and systems controls.


The following issues will be considered in setting a TM44 air conditioning energy inspection of systems more frequently than 5 years:


a)     Inefficiency of air conditioning systems

b)     Significantly oversized in relation to cooling requirements

c)     Evidence that the design is not fit for purpose

d)     Evidence of poor installation

e)     Evidence of lack of maintenance

f)      Control system out of adjustment

g)     Age of system


What can London Cool provide me with?

London Cool work on the assumption that with minor help, everyone should be able to save energy. And whilst that might be through the use of your air conditioning, tackling high voltage lighting and, for example, levels of insulation, can lead to big savings.


Our energy assessors can perform inspections and issue reports on all types of air conditioning systems. The depth and quality of our assessment is reflected in our vast knowledgeable energy efficient within the built commercial environment. 


There are simple things to save energy such as ensuring your air filters are clean, reducing the temperature set point, setting a timer to ensure the equipment is off when the building is unoccupied.  Should you use London Cool as regular maintainers, we will ensure your system(s) are working correctly and heat exchangers are clean. Planned preventative maintenance also reduces the chance of equipment failure.  Every little bit of energy saved is money in your pocket.


To be compliant with these regulations and to get further advice on the TM44 air conditioning energy assessments, please call London Cool on 0800 440 444.