PURPOSE BARNS 



so low that an adequate supply 

 of air cannot be furnished 

 without producing too low a 

 temperature in the barn, but 

 under general temperature 

 conditions it is possible to ven- 

 tilate the barn adequately, if 

 the proper attention is given 

 to the King system. 



The efficiency of the King 

 system depends upon the loca- 

 tion, size and straightness of 

 the intake flues and outlet 

 flues, practically air-tight, 

 non-conducting walls and ceil- 

 ing, and good tight doors and 

 windows. As in any natural 

 or automatic system of venti- 

 lation, no provision can be 

 made to warm the incoming 

 fresh air except the heat sup- 

 plied 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 inter- 

 vals along the side of the barn 

 wall. The minimum length of 

 the flue must be five feet be- 

 tween A and B, Figure 3, so as 

 to guard against air flowing 

 outward. It is very impor- 

 tant that the inlet flue be cov- 

 ered with fine wire screening 

 to prevent the flue from be- 

 coming obstructed. The valve 

 or register should be arranged 



2 - RIBBON 



VALVE: 



Fig. 3. A Valve Intake 



The amount of air entering barn can 

 be controlled by the valve built in 

 some intake flues. The distance be- 

 tween A and B should be not less 

 than 5 feet. 



Nine 



