Stay comfortable all year round with this Air Purifier and Humidifier from Guardian Technologies. It is designed for year-round use by combating both dry and dirty air! With 2 level filtration， the 360-degree H13 HEPA filter captures 99.97% of dust and allergens as small as .3 microns in size， while the large activated carbon filter attacks common household odors， including those caused by smoke， cooking and pets! Large Room Circulation Air Purifier circulates the air 1x per hour in 1，860 square foot rooms and 4x per hour in 384 sq. ft rooms， making it ideal for bedrooms， living rooms， open-concept spaces， classrooms and more! It includes an Air Quality Monitor that detects the particles in the air and displays the air quality in real time. Set the air purifier in Auto Mode and it will automatically adjust the fan speed settings to optimize room air quality. Doubling as a humidifier for the dry months， the evaporative humidifier tank can be attached to the top of the air purifier to help add moisture to the air. Silver Clean Protection is embedded in the tank to fight the growth of mold and mildew on the surface of the water tank. The 0.8-gallon humidifier tank will disperse mist for up to 12 hours on low at a time! Features an easy-to-read water level window. Humidifiers help relieve dry air that causes coughs allergies， dry skin， dry eyes， and nose bleeds. Ideal moisture helps soothe skin and combats congestion， especially in the dryer months， allergy season and winter!