Coway Airmega 400(G) Smart Air Purifier True HEPA Air Purifier with Smart Technology @ Amazon

[Coverage] Designed to clean spaces up to 1,560 sq. ft. in 30 minutes.

[HyperCaptive Filtration System] Combination of a pre-filter, deodorization filter, and True HEPA Filter reduces 99.999% of 0.01-micron particles, including pollen and other allergens; It also reduces 99% of volatile organic compounds and odor.

[Smart Mode] With its Smart Mode feature, the Airmega automatically adapts to its surroundings by adjusting fan speeds based on the room's air quality; That means your unit is energy efficient without compromising effectiveness.

[Eco Mdoe] When the air quality in the room remains purified for 30 minutes or more in Eco Mode, the fan will turn off to conserve energy, kicking on again when pollution is detected.

[Sleep Mode] When the Airmega's built-in light and pollution sensors detect that the room has been dark and the air clean for 3 minutes, Sleep Mode reduces the purifier's noise and power consumption.

[Air Quality Indicator] 24/7 pollution monitor air quality throughout the day, adjusting purification to the necessary level and saving energy when it's not needed.

[Filter Alerts] The air filter indicator tells you when the filters need to be replaced and the prefilters need to be cleaned for maximum efficiency, based on how much air they have processed.