HEPA Stands for “substantial-efficiency particulate air.” The filter engineering is the result of an industrial need that became vital during the Atomic Age: high volumes of really cleanse air, critical with the creation of microprocessors as well as other sensitive instruments. กลิ่นไม่พึงประสงค์ เช่น ควันบุหรี่ น้ำเน่าริมทาง เป็นต้น Corbat recommends getting air https://www.mannature.com