Pure Guardian H910BL Ultrasonic Cool Mist Humidifier, 14 Hrs. Run Time, 210 Sq. Ft. Coverage, Small Rooms, Quiet, Filter Free

Q: Can you use this with essential oils?

No. The owners manual specifically states: "The use of water additives including ethereal/essential oils, fragrances, eucalyptus, water conditioners, etc. will damage the appliance materials and as a consequence the whole unit. Any use of such additives will void the manufactures warranty."