Dust Management in Horse Facilities

will decrease providing a healthier breathing environment.
Infiltration is unintended ventilation. It occurs in a barn when air slips in through cracks in walls and floors or through gaps around windows and doors. Although not the ideal form of ventilation many stables have significant infiltration.
Mechanical ventilation utilizes equipment such as fans vents in the walls and ducts. For natural ventilation consider the stackchimney effect aspiration and perflation. Aspiration can be thought of as the effect of the wind blowing across the roof of the barn while perflation is the effect of air blowing from one side of the stable to the other. The stackchimney effect depends on temperature and moisture differences between the inside and outside as well as the height of the stable.
This is visually demonstrated by the steam seen as heat rises from a horses back while in the barn. In warmer temperatures the hot air in the barn escapes through openings in the ceiling or at higher levels of the barn vents windows cupolas etc. reducing the pressure at the lower level of the barn. The reduction in pressure near the ground allows cooler air to be drawn in through open doors windows and vents. This phenomenon can occur in reverse to a lesser degree during cooler months when the difference in temperature between the inside and outside of the barn isnt as great. Under these conditions the stack effect is not as strong.
How Can Air Quality be Improved? 
Soffit and ridge vents also can be used to improve ventilation. Soffit vents are installed under the eave of the roof and work to pull cool air in allowing warm air to escape through openings in the roof. Ridge vents run along the entire length of the peak ridge of the roof. These work primarily to allow warm air to escape from the facility.
Much research has been conducted to determine what influences particulate matter in the air. This research allows stable owners to improve the quality of air by making very basic changes to their management practices.
Clutter  The first thing to think about is minimizing the clutter around the barn. If half the bridles havent been used recently it isnt necessary to scatter them over the tack trunk. Removing dustcollecting objects from the barn will remove only the visible dust the particles that tend to be the most harmful are those that cant be seen with the naked eye.