The MeacoClean CA-HEPA 119x5 can move up to 595m3 of air per hour. The more often the air from your room goes through the air purifier each hour the cleaner the air will become. If your symptoms are mild then three times an hour will be fine, five times an hour will give better results and a factor of seven or eight times an hour should be used if your allergy is severe. The table below gives you an indication of the room sizes that the MeacoClean CA-HEPA 119x5 can purify for you. The MeacoClean CA-HEPA 119x5 air purifier features a particle counter which varies the air purifiers performance depending on the number of allergens in the air and a colour changing light that indicates the quality of the room air.  A filter replacement indicator will tell you when to replace the filter set (approximately every 6 months).  It also has a sleep mode to reduce the fan speed and turn off the lights to ensure a good nights sleep with purified air. The enhanced charcoal filter contains 450g +/-20g of charcoal for superior odour removal.  The enhanced charcoal and HEPA filters have a rubber gasket seal to make sure that no air can pass through the air purifier without being cleaned. The MeacoClean range has been designed to offer you a superior air cleaning solution to your allergy problems at an affordable and sensible price.  You can buy the MeacoClean CA-HEPA 119x5 safe in the knowledge that you are buying an air purifier that really will make a real difference to your quality of life.