code: private int coding(final String unit) throws KNXFormatException
  	{
  		expUnitAdjustment = 0;
  		// @formatter:off
  		switch (unit) {
  		case "Wh": return 0b00000000;
  		case "MWh": expUnitAdjustment = 6; return 0b10000000;
  		case "kJ": expUnitAdjustment = 3; return 0b00001000;
  		case "GJ": expUnitAdjustment = 9; return 0b10001000;
  		case "l": expUnitAdjustment = -3; return 0b00010000;
  		case "kg": return 0b00011000;
  		case "W": return 0b00101000;
  		case "MW": expUnitAdjustment = 6; return 0b10101000;
  		case "kJ/h": expUnitAdjustment = 3; return 0b00110000;
  		case "GJ/h": expUnitAdjustment = 9; return 0b10110000;
  		case "l/h": expUnitAdjustment = -3; return 0b00111000;
  		case "l/min": expUnitAdjustment = -3; return 0b01000000;
  		case "ml/s": expUnitAdjustment = -6; return 0b01001000;
  		case "kg/h": return 0b01010000;
  //		case "": return 0b01101110; // 'units for HCA', we will opt for 'dimensionless counter'
  		case "": return dimensionlessCounter;
  		default: throw newException("unsupported unit", unit);
  		}
  		// @formatter:on
  	}
docs: try to find the coding based on unit