Running Costs of Compressors
  £/Yr = cost per year  
  kW = kilowatts of compressor  
  £/kwhr = electricity cost per kilowatt hour  
  m.e. = motor efficiency  
hrs/yr =  Annual operational hours of the compressor
£/Yr = cost per year
p.f. = power factor
amps
volts
£/kwhr = electricity cost per kilowatt hour
hrs/yr =  Annual operational hours of the compressor