Electronic air cleaners use electrostatic charging and collection plates to remove particles as small as 0.1 microns, achieving 85-95% efficiency for typical household contaminants. Also called electronic precipitators, these devices ionize particles in a charging section, then collect them on oppositely charged collector plates. Operating costs are minimal since filters require only periodic washing rather than replacement.
Technical Operation
Devices operate at 6,000-8,000 volts DC to ionize particles entering the collection chamber. Collector plates capture charged particles and require manual cleaning every 2-4 weeks for optimal performance. Most units produce minimal ozone, typically under 5 ppb (parts per billion), well below EPA standards of 70 ppb.
Installation and Maintenance
Electronic air cleaners cost $500-$1,500 installed and fit standard 16×25 or 20×25 filter slots. Monthly cleaning maintains peak efficiency; neglected units lose effectiveness rapidly. They work best in homes with 5-8 occupants where particle loads justify the $20-$50 annual operating cost.