View on LOZ Suggested Retail: $229.99. Coway AP-1512HH White HEPA Air Purifier, 16.8 x 18.3 x 9.6. The mighty air purifier is equipped with cutting edge features to keep your indoor air clean. Equipped with a HEPA efficiency rating of 99. 97 percent, it uses a four-stage filtration system to effectively eliminate odors and pollutants. This mighty machine includes an air quality indicator through our particle sensing technology that will kick your air purifier into high gear when needed. And when pollution is not detected for 30 minutes, the fan will automatically stop to save energy.. 7 CALENDAR DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.