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Each purchase is for a quantity of 2 filters designed to replace the Relion WF813, Duracraft AC-813, and Robitussin ACR-832 humidifier wick filters. These filters are manufactured by FilterBuy to fit a number of humidifier models, including ReliOn humidifier models: RCM832, (RCM-832), RCM-832N, and DH-830.
We sell these in packs of 2 as each of these units generally requires 2 filters to be used at a time. All Humidifier FilterBuy filters are designed and engineered by FilterBuy in the USA to prevent the growth of mold, mildew, or bacteria so that it doesn't enter your air stream.
All humidifier filters should be replaced regularly in order to ensure the optimum performance of your unit. In most cases, we recommend changing your filters every 2 months or roughly twice per season. However, in areas where there is higher metal content in the water (i.e., the water is considered 'hard'), the filters may need to be changed more often.
Humidifier FilterBuy: Breathe Better!