The frequency of running your air purifier depends on the air quality in your home and your specific needs. For constant air purification, some models are designed to run continuously. However, for occasional use or in areas with low pollution levels, you might only need to run the purifier during certain times, such as when cooking or after cleaning.

Consider factors like the size of the room, type of pollutants you want to address, the CADR (Clean Air Delivery Rate) of the purifier, and the specific features you desire (e.g., remote control, programmable timer).