Ventilation of Farm Buildings. 



363 



peratnre before it falls to the floor. In this way the heat 

 which is wasting at the ceiling is saved and the animals 

 are prevented from lying in cold air. 



Provision is further made for the air to enter the intakes 

 outside at a distance of 3 or more feet below the ceiling so 

 as to prevent the warm air being drawn out at these places 

 by suction or to pass out directly as it would if they opened 

 directly through the walls. 



These openings should be placed on all sides of the 

 stable if possible so as to take advantage of the wind pres- 

 sure at all times in increasing the draft. It is better to 

 have many small openings than a few large ones because 

 the cold air is better distributed, lessening drafts. 



448. Construction of the Ventilators The best form of 



ventilating flue is that represented in Fig. 160, made of 

 galvanized iron in cylindrical form. Another good form is 



Fio. 158. Method of ventilating a lean-to stable. The air enters as rep- 

 resented by the arrows at A B and passes out through a flue built 

 011 the inside of the upright or main barn. This flue may rise di- 

 rectly through the roof or it may end at E as shown In the figure, 

 the air passing through a cupola. If the upright barn has a bal- 

 loon frame, thru the space between the studding could be used 

 as ventilating flues in the same manner as described in * ig. 154. 

 These flues could be made tighter by covering inside and out on the 

 studding, with the lightest galvanized iron. 



