332 VENTILATION 



jacketed stove tends to keep all of the air in the room in 

 constant circulation, it is possible to place such a stove in one 

 corner of the room, thus economizing floor space (Fig. 235). 

 Being placed near the outside wall, fresh air is readily admitted 

 through a wall register into the space within the jacket (Fig. 

 236). Here the fresh air is heated and joins the general 

 circulation of room air. A ventilating flue, with its bottom 

 open and top extending through the roof, is attached to the 



FIG. 235. Jacketed heating and ventilating stove. 



side of it. This flue constantly removes foul air from near 

 the floor. By means of a lever, conveniently located and 

 operating a set of vanes, the amount of fresh air admitted is 

 easily controlled. In the morning, till the room is heated, 

 or on a day when the temperature is low and the wind high, 

 these vanes may be closed, thus heating the room by inside 

 circulation alone. In recent years many of these heating and 

 ventilating devices have been installed in rural schools, thus 

 greatly improving their sanitary condition. 



