| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter device for an indoor ventilating hole which is fitted to the indoor ventilating hole regardless of the layout of furniture, and the like, without contaminating the interior of a room with captured dust, and the like, and enables free designing of itself without consideration over an indoor neat appearance and suppression of a pressure loss. SOLUTION: A filter 13 is fitted to an outdoor port 12a of the indoor ventilating port 12 from outdoors by means of a filter fitting 14, so that the interior of the room is not contaminated with dust, and the like, during replacing the filter 13. In addition, this filter device 10 for the indoor ventilating hole 12 can be fitted to the indoor ventilating hole 12 regardless of the layout of indoor furniture, and the like. Besides, it is possible to freely design the filter device 10 without consideration over the indoor neat appearance and, consequently, suppress the pressure loss of the filter 13.
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