12 



WISCONSIN BULLETIN 266 



larged so that its capacity will not be reduced. The ventilat- 

 ing flue acts as a chimney and should therefore, rise above 

 the highest part of the building in order to receive the full 



FIG. 7. INLET FLUES ADDED TO OLD BARN 

 Fresh air inlet flues can be added to any barn with but very little expense. 



force of the wind. The velocity of the wind, as well as the 

 difference in temperature between the inside and outside 

 make the flue draw. 



It is important that great care be taken in locating the 

 outlet flues. These should not be placed too close to the heads 



