Product review (5 stars): Absolutely Essential For Allergy Sufferers
OEM products can be expensive.  Many companies make replacement products that are just are good as the OEM products, but at a much lower cost.  Crucial Air is a maker of top quality replacement parts.

The filters fit the Graco 4 gallon humidifier model 2H02 and TrueAir 05521.  The filter should be changed when it becomes hard to the touch or discoloration.  This will help prevent bacteria or mold from entering the air.  This is a three pack so you should be able to go many months without having to buy more filters.  Crucial Air designed and engineered the filters in the United States.  That adds a great deal of confidence in its use and success.

The Graco 4 Gallon Humidifier Filters by Crucial Air were provided free of charge to complete and post a factual review without compensation. Positive reviews are earned only through positive product attributes and performance.