The costs of a TM44 inspection depends on the type of air conditioning system that you have installed. The CIBSE TM44 inspection guidance describes the methodology to follow so we would need to know about the components of your system in order to quote a price. The inspections fall under 2 categories, level 3 inspections & level 4 inspections. An example of a TM44 inspection level 3 would be 7 split units with a centralised controller. A level 4 inspection would typically involve 1 or more AHU and/or chillers, these type of inspections tend to cost more due to the time taken to inspect the components. If you would like to know more about TM44 inspection costs then please let us know what equipment you have installed and we will get back to you with a formal quote and competitive price.