Energy Efficiency and Electronic Filtration
Electronic filtration, also commonly known as Electrostatic Precipitation, can save energy because of its inherently low pressure drop. However, many considerations must be addressed during the design process to insure that this method cleans the air flow effectively over the long term. Electronic filtration seems to work better when a low-efficiency prefilter is installed upstream of the unit. Maintenance and cleaning must be considered along with the impact of power outages and the re-entrainment of collected dust. The power consumed for electrostatic filter operation is scanty. Electronic filtration in cleanrooms may be best used to prefilter HEPA or Ultra Low Penetration Air (ULPA) filter banks. In this situation, HEPA filters would consume less energy because much of the usual filter loading would be handled by the electronic filter; the HEPA filters would provide both a final cleaning and a guard against re-entrained dust, etc.
Efficiency of electronic air cleaners
Cleanroom electronic air cleaner