Ceiling tile dust guard

DETAILED DESCRIPTION The present invention is directed to a dust guard for installation on a room ventilation duct vent.
The duct vent defining a plane parallel to the ceiling and providing a direction of air flow out of the vent into the room.
The dust guard adjacent the duct vent providing a peripheral wall substantially perpendicular to and projecting away from the duct vent into the room directing air into the room so that static electricity doesn't attract particles in the air flow onto the ceiling tiles adjacent the duct vent.
The dust guard comprising in combination, a room having a wall with the wall comprising a ceiling, a ventilation duct vent, and rails in the ceiling; In combination, the duct vent comprising first and second parallel rails in the ceiling and third and fourth parallel rails in the ceiling perpendicular to the first and second rails; the first, second, third, and fourth rails supporting the vent housing; and the dust guard being captivated between, the vent housing and the first, second, third, and fourth rails wherein the dust guard is held in place by the weight of the vent housing.
The dust guard further comprising in combination, a first element captivated between the vent housing and the rails in the ceiling, the peripheral wall being supported by the first element and the first element comprising a panel perpendicular to the peripheral wall.
The duct vent having first and second parallel sides and third and fourth parallel sides perpendicular to the first and second sides, and the dust guard further comprising a first member having a first section lying along the first side of the duct vent and a second section attached to and perpendicular to the first section lying along the third side of the duct vent and a second member having a third section lying along the second side of the duct vent and a fourth section attached to and perpendicular to the third section lying along the fourth side of the duct vent.