CHAPTER I

PAGE

THE STEAM HEATING PLANT 1

Heat of Vaporization--Steam Temperature--Gage Pressure--Absolute Pressure--Two-pipe System--Separate-return System--Overhead or Drop System--Water-filled Radiators--Air Vents--Automatic Air Vents--Steam Radiator Valves--The House-heating Steam Boiler--Boiler Trimmings--The Water Column--The Steam Gage--The Safety Valve--The Draft Regulator--Rule for Proportioning Radiators--Proportioning the Size of Mains--Forms of Radiators--Radiator Finishings--Pipe Coverings--Vapor-system Heating.