Key features of the hf290 5 stage air purification is 9997 effective at removing particles easy to take apart and clean long lasting hepa filter low power consumption easy operation 3 fan speeds the heaven fresh hf290 multi technology air purifier has been designed to make the air you breathe cleaner and healthier the purifier uses multiple specialist filtration systems to remove airborne pollutants particulates bacteria and viruses the first stage the polluted air gorsquos