A:AnswerDepends on the air quality. During the bad smoke from California fires the filter only lasted a week and a half.
https://www.amazon.com/GermGuardian-FLT5000-Replacement-Germ-Guardian/dp/B003AKIGFS
A:AnswerYes, this unit will help to filter out cigarette smoke and odor. We suggest placing it near where you believe the odor is coming in from to allow the unit to work as quick as possible.
A:AnswerYes, it will just take longer to filter the air. The space rating is based on air flow per minute and a certain number of times the volume of a room will pass through the filter.
A:AnswerThe AC5300B, only has 3 fan speeds and the UV light option. The AC5350W offers 5 fan speeds, UV light and Timer option. They both take the same replacement parts and cover the same area.
A:AnswerLeave it running constantly to continuously clean the air and let the ultraviolet light kill viruses. These things can stand to run for years and years. Why would you want your air only half as clean?