You forgot the facility expenses for your filter (which wouldn't be A lot). The issue with air filters is the expense of the filters (yours are Alright, but most are very pricey).Could be the "Adjust Filter" indicator for indicating the HEPA filter has to be replaced or even the carbon filter (or both) ?No antihistamine prescription drugs get the j

I also seen the 'fresher' air feel when the air filter (Airclean E20 Moreover) is turned on and the air particle counter confirms the advance in air high quality. I think the carbon filter helps make a change likewise by taking away the smell from your air.I might like quiet, would like to use in my bedroom, and whilst Blue Air are 32db, Sharp leve