Powered by ultrasonic technology, NH810 is designed to run up to 18 hours in just 1 fill, to replenish the much-needed moisture for year-round relief from aircon’s drying effects. Complement with novita Air Purifying Solution Concentrate, the NSF certified & EPA registered active ingredient from USA, diligently oxidizes 99.99% of bacteria & virus through the humidifying function to protect you & your loved ones.