According to the Energy Performance of Buildings Directive, all air conditioning units must be inspected, tested and approved by January 2011. This applies to air conditioning units that consist of a 12kw rated output or larger. January 2011 is 16 months away, but there are growing concerns that even this timeframe will not be enough for all assessors to inspect the thousands of buildings that need to be assessed. Having an air conditioning unit is a significant addition to your work or home space and making sure that these units are in perfect working order is imperative.