10 



WISCONSIN BULLETIN 266 



I -2 * > fc IBB ON 



VALVE- 



state the temperature is 

 at times so low that an 

 adequate supply of air 

 cannot be furnished with- 

 out producing too low a 

 temperature in the barn, 

 but under general tem- 

 peratures conditions it is 

 possible to ventilate the 

 barn adequately, if the 

 proper attention is given 

 to the King system. 



The efficiency of the 

 King system depends 

 upon the location, size 

 and straightness of the 

 intake flues and outlet 

 flues, practically air-tight, 

 non-conducting walls and 

 ceiling, and good tight 

 doors and windows. As 

 in any natural or auto- 

 matic system of ventila- 

 tion, no provision can 

 be made to warm the 

 incoming fresh air except 

 the heat supplied from 

 the bodies of the animals. 

 The fresh air is warmed 

 by mixing it with the 

 warm air of the barn at 

 the ceiling before it is 

 breathed. 



These fresh air intakes 

 are located at 12 to 14 

 feet intervals along the 

 side of the barn wall. 

 The minimum length of 



FIG. 5. A VALVE INTAKE the flllC HlUSt be five feet 



The amount of air entering barn can be between A and B, Figure 

 controlled by the valve built in some intake _ i 



flues. 5, so as to guard against 



