Air purifier - Round 2

It has been a few months since the previous air purifier died.  We recently noticed that Julia and I have developed a cough, and we suspect it is due to the declining air quality in our apartment.  So we bit the bullet again today and bought a new air purifier at Ace Hardware.  It is a significant upgrade from the other one as it made by Honeywell and is the most powerful one they had. 

After we unpackaged it, everyone wants to get their room's air cleaned!  We even felt extra ambitious and cleaned out the filters in our A/C units in each room in the apartment.  Not sure the last time that was done...  I certainly hope all this effort and expense helps out our lungs, won't be too difficult to get air purifier filters, and that the new machine lasts for more than a year...