Patent ID: 9163846
Filing Date: 2015-10-20
Classification: F24F

Abstract:
1. A ventilation apparatus arrangement comprising: an air duct which extends in use from roof level into an interior of a building to be ventilated to convey air between the exterior and interior of the building, the air duct being polygonal in plan view and being divided into a plurality of duct sections by divider plates extending between upper and lower ends of the ventilation arrangement such that the air duct directs air motion caused by wind movement through one or more of the duct sections on a windward side of the air duct into the building interior, and to exhaust air from the interior of the building through one or more other of the duct sections on a leeward side of the air duct; ventilation openings for each side of the polygon which extend around an upper part of the air duct directing air motion caused by wind movement into or out of the air duct; the ventilation openings comprising an outer louvre arrangement defining a plurality of discrete openings, one above each other, and a closure arrangement comprising an inner louvre arrangement, the inner louvre arrangement being selectively slidable relative to the outer louvre arrangement between a closed condition closing the ventilation openings, and an open condition substantially clear of the ventilation openings, the inner louvre arrangement including a plurality of closure members, each movable between a closed position substantially closing a respective discrete opening, and an open position leaving the respective discrete opening substantially open, the closure members being connected to an actuator member such that the closure members on each side of the polygon are all simultaneously movable between the open and closed conditions, the closure arrangement being configured to permit partial closure of the ventilation openings with the closure members being held in positions between the open and closed conditions, wherein each of the closure members comprises a first portion, a second portion, and a third portion, wherein the first, second, and third portions are angled relative to each other, and wherein the outer louvre arrangement comprises a plurality of louvre members having a first portion, a second portion, and a third portion, wherein the first, second, and third portions are angled relative to each other.