To keep your indoor environment free of dust you need an air purifier. There are lots of products in the market now-a-days, many of them are not even worth looking. Many of them offer high end efficiency for their products but in term of use these products fail eventually.  Coway Air Purifier  is the one that stands out in the crowd for its unique features and extended support.Coway places its customers first and has invested heavily in Research & Development to guarantee the finest, most advanced products in the world. They have one of the largest environment technology R&D center in Asia. They ensure a 'quality first' commitment to our technology-oriented management and culture. Coway operates three R&D centers with more than 210 R&D and quality management professionals on staff, which makes it possible for us to deliver the best quality air purifier products to their customers. They constantly test air filtration systems, air filters, efficiency for air cleaning, and technologies to reduce noise. Unlike other air purifier manufacturers, they manufacture their own air filtration units, including the filters.Read more about Penapis air coway.  Each and every unit is quality controlled and tested before leaving our factory. They have a world-class facility and equipments to meet the diverse international requirements, including United State's C.A.D.R (Clean Air Delivery Rate) ratings. This is our commitment to our customers to ensure cleanest air. Coway Air Purifiers  offer enhanced technology to optimize efficiency. They have unique features compared to competitor's products like Yellow Sand Filter. The Yellow Sand Filter delivers refreshing healthy spring air to the entire house by eliminating 98.8% of Yellow Sand, micro sand, SOx attached to dust, NOx, and spring time atmospheric pollutants. Northern China and Mongolia are the origins of Yellow Sand during springtime. Yellow Sand is known to contain high concentrations of sand, heavy metals, and harmful gases. During this season, the dust concentration severely increases in Korea, China, and Japan, leading to higher occurrences of health problems such as rhinitis.For more info visit Penapis air coway.