Smartmi Air Purifier 2 design. Like the last-generation Air Purifier P1, the new Air Purifier 2 is built in a cylindrical design, with a display on the top, and power output on the back. Welll, of course it turns out the sound was coming from the tiny air particle sensor on the back of the unit which contains a tiny fan also. The unit was brand new and still making this sound. I was going to try and lubricate that tiny fan, but I ended up blowing some compressed air into it and it STOPPED. So far, it hasn't made any more noise. The packaging is quite simple and comes with 40 x 18 x 14 cm dimension and weighs 1.58 kg. it contains a Xiaomi Roidmi P8S car air purifier, a multi effect filter, an anti-PM2.5 smart filter, a 4.5m long power adapter and a stand. In case of not using the stand, it can be easily placed inside the car by strapping it with the headrest of car chair. Medical Grade True HEPA-13 Filter. Sterra Breeze uses a medical-grade True HEPA-13 filter which removes up to 99.97% of all airborne particles including viruses and secondhand smoke. It covers a 3 to 4-room HDB flat of about 80m² and delivers 400 m 3 /hr of fresh, clean air. When you are selecting an air purifier, always take note of the grade The typical lifespan of a 1”-thick home air filter is 90 days. If you are running the fan continuously, you should consider replacing it every 45 days. Keep in mind that unless you have someone with an active COVID-19 infection in your home, you’re not going to have any source of the coronavirus to reduce or filter out using any of these EjvtIc.

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