Air purifier update

Today I noticed that the check filter light came on the air purifier.  This is about right as this first filter changes was very close to the suggested 3 month interval.  Sure enough the outermost filter was coated in a layer of gray dust.  I cut the replacement filter to size (should be enough for two changes per box) and reinstalled it.  So far, we are very happy with the new purifier and are enjoying the less frequent maintenance and the benefits of cleaner air in our apartment. :)