I have decided to buy the Sharp FP-P60cx air purifier and have placed my order; I should be getting it soon. After reading and carefully analysing your data as well and info about Ecoquest and Sharp I decided to get the Sharp. I realized that I already have a powerful ozone generator that I use in my home and am pleased with ozone; my family tolerates it well. It was not immediately apparant to me that the Ecoquest used ozone in its process. I will report again after getting the Sharp air purifier and using it.