Patent ID: 9179640
Filing Date: 2015-11-10
Classification: A01K,F24F

Abstract:
1. A building comprising: at least one containment area; a ventilation duct located at a ceiling of said containment area and defining an air passage running along a duct length, said ventilation duct including at least one of an opening and a gap positioned to permit fluid communication from said air passage to said containment area; an exhaust fan interposed between the containment area and ambient air outside the containment area, said exhaust fan oriented to create a relatively lower air pressure within the containment area as compared to a relatively higher air pressure within said air passage of said ventilation duct, said exhaust fan positioned to receive a flow of air drawn from the ambient air outside the containment area into the containment area via an exhaust opening, said exhaust opening interposed between said exhaust fan and said ventilation duct and positioned below said ventilation duct such that said flow of air is drawn downwardly from said ventilation duct and through the containment area and exhausted externally of the containment area, whereby upward airflow of said flow of air between said exhaust opening and said ventilation duct is substantially avoided within the containment area.