Product review (5 stars): Graco 2H03 filter
I'm really surprised at all of the negative reviews on this filter.  I use the 4 Gallon Graco humidifier in my small wine/cigar cellar and still have the original filter after almost a year!!!  Admittedly it's finally given-up-the-ghost and I'm ordering replacements now, but wouldn't dream of switching brands.  Perhaps it's simply a matter of how much water gets processed through it and mine set at 75% humidity only uses 4 gallons of water every 2-3 weeks.  In any event the unit and the filter suit my needs and pocketbook just fine...