Product review (3 stars): Monthly Cost Not Anticipated
I have mixed feeling about this product.  The filter works well but does not last long.  Mildew builds up quickly.  I have to remove it everyday and take it outside so that it can air-out to perserve a longer life span.  I us it everry night in the Honeywell 1012.  This system has reduce the number of sinus headaches I get--that's the positive benefit.  The negative point is that each filter cost over $9 dollars and only last approximately a month if you leave it in continuously--Approximately $120 a year.  I called Honeywell to find out if there was a replacement filter that did not require changing.  Unfortunately, No.