The company checked the performance of three fixed speed and one variable speed compressors, and found that the variable speed unit was undersized for the job it was being asked to do.

Overall energy consumption for all four compressors was 28,524kW of electricity per week, at a cost of £2139. Thorite suggested a new HPC CSDX165SFC variable speed compressor, plus a SAM 4/4 3D controller and visualisation package, capable of automatically adjusting air output to suit varying power demands. 

Energy consumption has fallen to 20,369kW per week, at a cost of just £1559, with annual savings of over £30,000.