Airborne pollutants are on the up & if you suffer from allergies adding an air filter to the areas you spend most of your time in like your bedroom or living room can help. The Bionaire BAP1700 Air Purifier with Permatech filter removes airborne particles & gives you a healthy & clean living environment. It is very powerful & filters out dust pollen tobacco smoke mould spores & pet dander. It also features an air quality particle sensor that will measure the indoor air quality. On auto mode the unit will adjust the fan speed to provide optimum filtration which also helps to conserve energy by only operating when needed. It is ideal for a medium room size & it comes with 4 speed settings. It is very quiet on low settings & it has a 8 hour timer with an independent ioniser & air quality particle sensor making it a complete household device.4 speed settings Quiet on low setting 8 hour timer Independent ioniser Air quality particle sensor Filter change indicator Max. noise level 56 d B Max. power 90w Weighs 7.4kg Measures 68x 26x 15cm Two year guarantee British Allergy Foundation Seal of Approval CADR combined: 558m 3/hr CADR m 3/hr: Pollen: 186 Tobacco Smoke: 186 Dust: 186 Permanent HEPA filter means no filters to replace saving you both time & money