I can recommend Alen BreatheSmart Source: https://houseandbeyond.org/best-air-purifier-for-mold I've recentely purchased We've run this filter almost non-stop for six months in our high-allergen home (an old, damp farmhouse with pervasive spring-fall mold growth, two cats and a dog, lots of dust/pollen, where the HVAC system is windows and a wood stove) on the automatic setting, only vacuuming the filter twice so far, without any noticeable change in efficacy and the filter light (which changes color when it is time to buy a new one and again when it is time to change the filter) has not yet changed.