Article

Use of air-cleaning devices to create airborne particle-free spaces intended to alleviate allergic rhinitis and asthma during sleep

Department of Mechanical Engineering, Laboratory for Heat Transfer and Fluid Flow Practice, University of Minnesota, Minneapolis, MN 55455-0111, USA.
Indoor Air (Impact Factor: 4.9). 01/2006; 15(6):420-31. DOI: 10.1111/j.1600-0668.2005.00387.x
Source: PubMed

ABSTRACT

Abstract
Abstract Comprehensive quantitative experiments were performed to assess the capabilities of several air-cleaning devices to create a particle-free microenvironment as a therapy for sleeping persons affected by allergic rhinitis and asthma. Six devices were evaluated, of which five were portable and intended to provide general air cleaning for bedroom-sized spaces. The sixth was intended for installation in front of the headboard of a bed and was designed to provide clean air focused in a space occupied by a sleeping person. The air-cleaning methods of the selected devices included high-efficiency particulate air (HEPA) filtering and electrostatic precipitation. Particle concentration measurements for six particle-size ranges and sound intensity measurements were made during 8-h, sleep-simulating periods. The effects of four parameters were studied: (i) device location, (ii) controlled air motion in the laboratory, (iii) airflow rate setting of the air-cleaning device, and (iv) controlled disturbances. To ensure a totally objective study, a special laboratory facility was constructed which enabled complete control of the experimental conditions. The measured concentration histories provided comprehensive evidence of the relative capabilities of the various devices for the specific air-cleaning function. It was found that the device designed to focus the cleaned air in the sleeping space fulfilled its goal and, in that regard, was clearly superior to all of the other air-cleaning devices.

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Available from: E. M. Sparrow, Aug 31, 2015
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    • "The concentration of particles indoors can be reduced by installing electrostatic deposition air cleaners, particulate collection devices that remove particles from a flowing gas (such as air) using the force of an induced electrostatic charge. Electrostatic air cleaners are able to remove small airborne particles very effectively (Mattsson et al. 2004; Croxford et al. 2000; Skulberg et al. 2005), including allergenic particles (Hacker and Sparrow 2005; Francis et al. 2003; van der Heide et al. 1999), whose concentrations in school classrooms are often as high as they are in the homes of pet owners (Almqvist et el. 1999; Berge et al. 1998). "
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