Higher capacity air purifier will clean the air faster and hence it is not necessarily a negative. However, an oversized air purifier will simply take more space and generate more noise if the room does not need that large an air purifier to keep the air clean.Should you leave air purifier on all day?
Yes, you can leave the air purifier on all day. Do make sure the fan settings are set to the right mode so that it doesn't forcefully run at higher speeds when not needed.How long do air purifier filters last?
Air purifier filters last from 3-6 months depending on the usage and dust levels of the environments that they are being used in. If usage is seasonal and not continuous, filters can last as long as 12 months as well.