Swine shelter ventilating system

Claim 1

A ventilation system for a swine shelter house having an interior spaced defined by a roof, first, second, third, and fourth sidewalls, the first and third sidewalls being disposed opposite to each other, and a manure pit; a slotted floor being disposed above the manure pit, said ventilation system comprising: a first air inlet means disposed approximately at the juncture of the first sidewall and the roof, for permitting air flow from the outside atmosphere into the interior space; a second air inlet means disposed in a lower portion of the first sidewall, for permitting flow of outside atmospheric air into the interior space; a first air exhaust means formed in the third sidewall above the level of the slotted floor, for permitting air flow into the outside atmosphere from only the interior air space within the manure pit below the floor; a second air exhaust means, formed in the upper portion of the third sidewall, for permitting air flow from the interior space into the outside atmosphere; said system being operable in a winter mode and a summer mode; said winter mode comprising a winter ventilation system wherein said first air inlet means is open and said second air inlet means is closed, and said first air exhaust means is open and said second air exhaust means is closed; said summer mode comprising a summer ventilation system wherein said first air inlet means is closed and said second air inlet means is open, and said first air exhaust means and said second air exhaust means are open; and only said first air exhaust means employs powered ventilation in the form of an exhaust fan disposed in said third sidewall to draw outside air through said first sidewall across said house into said manure pit and thru said third sidewall via a vent chamber which extends from said slotted floor and surrounds said exhaust fan.