ขึ้นอยู่กับประเภทของไส้กรองและการใช้งาน โดยปกติ Matching Your air purifier for your area sq. footage and type is important for it to operate at its best. A normal guideline is to select an air purifier by using a CADR that may be at least two-thirds the dimensions on the room. Verify the CADR (clean waiting for link from Social Network Posts (25)