How does the performance of electronic air cleaners compare to HEPA filtration?
• These devices, which capture particles on charged plates or grids, are also known as ionizers or electrostatic precipitators. They are far less efficient than a true HEPA filter, even when the collection plates are clean. As happens with electrostatic filters, their efficiency will drop off precipitously as the collection plates get dirty, and homeowner cleaning and maintenance becomes an issue.
