The Respironics Dreamstation CPAP and Bilevel machines are used with two different filters; the Pollen filter works on the larger air particles. Best used with the Dreamstation Ultra-Fine filter. It is disposable and recommended to be replaced every 6 months, wash once weekly in warm, soapy water with a gentle soap. Sold individually.
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Just what i needed
Great, no problems with genuine replacement part and at a great price