CHAPTER XII.

SELECTION OF CLEANING PLANT.

Renovators 179 Hose 182 Pipe Lines 182 Separators 182 Vacuum Producers 183 Control 183 Selection of Appliances for Four Classes of Work 184

CLASS 1.--Plant for Residence or Small Office or Departmental Building, to be Not More than One-Sweeper Capacity.

CLASS 2.--Large Office or Departmental Building Where Carpet Cleaning is Important and Pipe Lines are of Reasonable Length.

CLASS 3.--Large Building or Group of Buildings Where Carpet Cleaning is Important and Long Lines of Piping are Necessary.

CLASS 4.--Large or Small Plant Where Carpet Cleaning is Not an Important Function of the Cleaning System.