IQair Healthpro 250 for sale. Never gave me a bit of trouble, but as its an extra machine, I am now selling it. On Fan speed 6 (the highest setting), the filters have the following amount of life left: HyperHepa 3680 hours V5 189 hours PreMax 1376 On fan speed 3, the filters would have double this many hours. The V5 will need to be changed this season if you are concerned about chemcial oder absorption, but it is the HyperHepa and the PreMax that remove the small particles so you can have clean air in your room when the outside PM2.5 count high. Removes over 99.97%! Buy it as it is for 5000 RMB, or if you want, I can sell it with extra filters (new in the box) New V5 Filter - 1200 RMB New PreMax - 700 RMB New HyperHEPA - 1600 If you want to buy a full set of replacement filters, I'll make it a package price of 3500 RMB, which will make it work like a brand new machine. Again, if you buy just the machine with its existing filters, it will more than get you through the winter for eliminating PM2.5.