The Hunter 31944 PermaWick Filter includes a set of 3 PermaWicks for 1 full change of models 34407 and 37407.

Fits Models
Hunter Humidifiers: 34407, 37407.

• Genuine Hunter PermaWicks Set
• Hunter Part: 87955, 8795501000 (31944)
• Includes set of 3 PermaWicks for 1 full change of 34407, 37407.
• Contains: 6-3/8" x 6-3/4" (1 pc), 4-1/2" x 6-1/8" (2 pcs)

From Hunter Fan Company: Many regions have hard water with high concentrations of minerals. When water evaporates from the humidifier, minerals may be left behind. These minerals can form a hard white scale which can be removed by following the cleaning instructions. The frequency of cleaning due to mineral build up can vary depending on the quality of the water you may have.

The PermaWick Filter should be cleaned in a vinegar and water solution to remove any mineral buildup. Place in a solution of 1 gallon of water and 8 ounces of undiluted white vinegar. Allow the filter to soak for 20 minutes. After soaking, rinse the filter several times with clean water and place in a location where it can drip dry.