Heating
The relation between ventilating and heating must be kept in mind. It is not only a question of providing a proper amount of pure air, but also a question of the proper temperature of the air. A poorly ventilated room is always more difficult to heat and an improperly heated room is very difficult to ventilate. Local heating should never be used in a schoolroom except when impossible to provide better means.
The best arrangement for heating school buildings is hot water or steam in connection with the ventilating system in which the air is passed over hot radiators before being forced into the classrooms and corridors. This is supplemented by heat from the radiators placed in proper locations throughout the building. In this way the temperature of the room may be kept at the proper degree and at the same time the air circulation and the humidity properly regulated. Best work is accomplished by the children when the temperature is kept at about 68° F.