PureMate 5-in-1 Multiple Technologies HEPA Air Purifier & Negative Ion Generator for Dust, Mould, Pets, Smokers,Cooking, Powerful for Large Room, 38m² The PureMate PM-510 air cleaning system has its efficient 5-stage filtering system. It’s quiet, easy to use and maintain with its unique 5-Stage filtering ability, it can cover a wide range of air pollutants. The first part of the 5-in-1 system is the pre-filter which uses activated carbon to trap larger particles found indoors such as dust, lint and hair. Activated charcoal is very porous, and its uneven surface is great for trapping larger pollutants, but there is another benefit to it as well. A carbon layer efficiently eliminates odours stemming from household pets, cooking and tobacco smoke. During the second stage, the air is filtered through a True HEPA filter. True HEPA filters have to meet strict standards which involve being able to collect 99.97% of airborne particles as tiny as 0.3 microns in diameter. For instance, stuff like pet dander, dust mites, mould spores and pollen all fall into this category. The third and fourth stage involves air filtration using UV-C light. This technology works to help kill airborne viruses, bacteria, mould spores, and with titanium dioxide (TIO2), decomposes odour molecules caused by smoking, cooking and pets. And finally the last stage the unit releases negative ions which enhances the mood, keeping you alert and active. It eliminate most tiny particles suspended in indoors air. In addition, the air will actually smell fresher because of the Ioniser. The PureMate PM 510 is suitable for rooms up to 400 square feet of in size which makes it perfect for most bedrooms. It stands 22-inches tall. The unit’s CADR (Clear Air Delivery Rate) is 110+ which effectively means it’s able to deliver 110 cubic feet of clean air per minute with 5 changes of air per hour. The PM 510 has 5 fan speed settings available. When set on low, the unit is impressively quiet at 20 dB (A). In fact most people won’t be able to tell its working if it weren’t for the large blue LED, and the cleaner doesn’t get much louder when the fan speed is set to medium. The air purifier now comes equipped with indicator lights that automatically blink when it's time to replace the Hepa Filter. No more trying to remember the last time the filter was replaced. A clean filter not only maximises the amount of dust and allergens captured but helps optimise the performance of the entire purifier. Special note: as part of our quality promise - every purifier we make is tested before it reaches you. If your reminder lights are blinking when you first turn on your purifier, simply reset the system by holding the UV button for at least 3-5 seconds or until the reminder lights stop flashing.