How large of an area does the Purest Sleep Diffuser cover? January 23, 2019 17:53 The Purest will fill a 300 square foot room. (For reference, a 10x20 ft. room is 300 square feet.) Related articles How long will the battery last on the Travel Mini Sound Machine? How do I know which setting the Purest is on? Do you have a guarantee or warranty?
