Building ventilation system

A method for ventilating an interior space, comprising:

• conveying air from an air handling unit into a plenum defined between a ceiling of the interior space and at least one perforated panel arranged beneath the ceiling of the interior space;
• pressurizing the air within the plenum and forcing the air through the at least one perforated panel evenly and uniformly as a high volume, low turbulence blanket of air that descends through the interior space and towards a floor of the interior space;
• drawing in air from the interior space into one or more return ducts via a return opening disposed proximate to the floor;
• and
• recirculating the air received by the one or more return ducts back through the air handling unit.

A ventilation system for an interior space, comprising:

• a housing suspended from a ceiling of the interior space;
• a structure provided on a floor of the interior space;
• at least one perforated panel arranged within a bottom facing opening of the housing;
• a plenum defined between an interior of the housing and the at least one perforated panel;
• an air handling unit configured to circulate air through the interior space, the air handling unit having a return air inlet and a supply air outlet;
• and
• a return duct in fluid communication with the return air inlet and extending to the structure, the return duct having a return opening provided in the structure proximate to the floor,
• wherein the supply air outlet is in fluid communication with the plenum to provide air into the plenum and thereby pressurize the plenum such that air flow is induced through the at least one perforated panel as a high volume, low turbulence blanket of air that descends through the interior space, beneath the housing, and is received by the return opening in the return duct for recirculation through the air handling unit.