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A study of local electrostatic filtration and main pre-filtration on airborne and surface dust levels in air-conditioned office premises

Croxford, B; Tham, KW; Young, A; Oreszczyn, T; Wyon, D; (2000) A study of local electrostatic filtration and main pre-filtration on airborne and surface dust levels in air-conditioned office premises. INDOOR AIR , 10 (3) 170 - 177. Green open access

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Abstract

The impact of electrostatic precipitation as a useful form of particulate filtration in the breathing zone is investigated in an intervention study in an air-conditioned commercial office in central London. Surface dust deposition and airborne dust levels are measured in the open plan zones of two floors - a control floor and a floor where the intervention is effected. The intervention consists of a sequence of weekly scenarios where the main pre-filters of the air-handling unit are switched between new and old filters, and where the electrostatic filters, located as uniformly as practicable on the open plan areas, are switched on or off. This 2x2 set of interventions is repeated over 4 cycles. It was found that the breathing zone filtration (BZF) by electrostatic precipitators reduces airborne dust significantly and appears to be more efficient in reducing smaller sized particles. No significant effect of BZF filters in reducing surface dust deposition was detected.

Type: Article
Title: A study of local electrostatic filtration and main pre-filtration on airborne and surface dust levels in air-conditioned office premises
Open access status: An open access version is available from UCL Discovery
Keywords: deposition, dust, breathing zone filtration, particle size distribution, suspended particles (TSP), INDOOR
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/2950
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