And Two, it’s a lot more delicate to filter lifestyle than some other purifiers: We’ve measured pretty major fall-offs when tests calendar year-aged filters. Blueair recommends replacing the filter “each and every 6 months or so,” and it’s best to stay with that plan. จัดส่งฟรี! เมื่อสั่งซื้อเครื่องกรองอากาศทุกรุ่น We examined the Coway https://www.mannature.com/products/detail/airpurifier