Personal air filtration system to deliver "allergen-free" air to patient's breathing zone during sleep

The PureZone personal air filtration system employs a HEPA filter air purifier, delivering air to a patient's breathing zone while he or she sleeps.

In a randomized placebo controlled cross-over clinical trial, the PureZone personal air filtration system was shown to reduce (by 99.99%) airborne allergens in the breathing zone for all bedroom environments. These exposure reductions led to significant improvements in nocturnal nasal and ocular allergy symptoms (P lower than 0.001) and quality of life (P lower than 0.001) (see the AAAAI abstract below). A decrease in nocturnal symptom was demonstrated after the first night of use and were maintained for the duration of treatment; these reductions resulted in meaningful improvements in sleep quality (P=0.005).

The efficacy data is available from the manufacturer website.


Stillerman A, Tierney N. Efficacy of PUREZONE(TM), a Novel Local High Efficiency Particulate Air (HEPA) Filtration Pillow Device, in Patients With Perennial Allergic Rhinoconjunctivitis (PARC): A Double-Blind, Placebo-Controlled Randomized Clinical Trial (RCT). Journal of Allergy and Clinical Immunology. 2009 Feb;123(2, Supplement 1):S271.

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Disclaimer: The manufacturer of the PureZone personal air filtration system has advertised on this website. They do not have influence on the editorial content and/or this blog post.

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