Effect of Air Cleaner on the Indoor Allergen Sensitized Allergic Rhinitis Patients

The active comparator group is a group that uses machines that have the same functions as those on the market. In intervention group, two air-cleaners will be activated, one in the living room (covers 91 m2) and the other in the bedroom (covers 58 m2). The air cleaner will be operated continuously for 6 weeks. Inside the air cleaner, a device for measuring the quality of the indoor air is built in. It will be used to compare indoor air quality before and after air cleaner operation. In order to maintain the double-blind setting, a label for 'prohibition of opening' will be attached to the joint of the outer case, and a sticker to cover the air quality measurement display part built in the air cleaner itself will be attached.

The Control group operates the air-cleaner with the same appearance as the experiment group. However, all the filters including HEPA filter will not be inserted in this group (mockup devices). Two mockup air-cleaners will be activated, one in the living room (covers 91 m2) and the other in the bedroom (covers 58 m2). The mockup devices will be operated continuously for 6 weeks. Same as active comparator group, a device for measuring the quality of the indoor air is built in the mockup air cleaner. It will be used to compare indoor air quality before and after air cleaner operation. In order to maintain the double-blind setting, a label for 'prohibition of opening' will be attached to the joint of the outer case, and a sticker to cover the air quality measurement display part built in the air cleaner itself will be attached.