| 摘要 |
A vent device (10) for communicating air from the duct of an air supply syst em into an environment, such as a room of a building, includes a body (12) havi ng a passageway (18) therethrough for receiving air from the air supply system, with the body (12) defining a first opening (20) for placing the passageway in fluid communication with the air supply system. Also includes is a filter housing defining a filter slot (46), the filter housing having an inner wall (50) provided with a plurality of first vent openings (54) for being selectively placed in communication with the passageway of the body. Further , the filter housing has an outer wall provided with a plurality of second ven t openings communicating with the filter slot and the room in the building so as to communicate air from the filter slot into the room. The vent device also includes a filter (58) for being removably received in the filter slot of th e filter housing, the filter defining an enclosure (60) having a cavity (62) which houses a filter material (63). The enclosure (60) has an inner and out er walls (64, 66), with the inner wall (64) being provided with a plurality of third vent openings (68) and the outer wall (66) being providing with a plurality of fourth vent openings (70) which register with the third vent openings (68) to provide air flow through the filter (58).
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