How Electrostatic Precipitators Work

Air is drawn into the unit to capture particles. The airborne particles pass through an electrostatic field and receive an ionized charge. The charged particles move into a collector section where each alternate plate is charged with the same polarity as the particles. This drives the particles to the second set of plates of an opposite charge to attract and collect the particles. The cleaned air is then exhausted in accordance with local, state, and federal codes.

Unlike media air cleaners that use replaceable filters that plug up when dirty, electrostatic precipitators contain permanent cells that can be washed, either manually or with an included automatic wash system. These permanent cells do not require added static pressure when they get dirty to pull air through them. This typically means motors are 1 to 2 sizes smaller, saving the operator energy costs, as well as the cost to dispose of dirty filters.

Call your authorized Trion Representative today and learn how Trion’s electrostatic precipitators may be your next best kitchen hood exhaust system. If you have an older electrostatic precipitator that you have questions about or may be in need of a maintenance check, contact your authorized Trion Representative for assistance.

Industry Definitions:
24.8 ASHRAE Systems & Equipment 1996 - "Electronic air cleaners can be highly efficient filters using electrostatic precipitation to remove and collect particulate contaminates such as dusts, smoke, and pollen. The designation electronic air cleaner denotes a precipitator for HVAC air filtration. This type of air cleaner can remove and collect contaminates with an average efficiencies up to 98%, when tested in accordance with ASHRAE Standard 52.1."

4.3.1 INDUSTRIAL VENTILATION A Manual of Recommended Practice 24th Edition - "The Penny or two-stage precipitator which uses DC voltages from 11,000-15,000VDC for ionization. It is the most practical collection technique for the many hydrocarbon applications where an initially clear exhaust stack turns into a visible emission as vapor condenses. Some applications include plasticizer ovens, forge presses, die-casting machines, and various welding operations. The pressure drop of an electrostatic precipitator is extremely low, usually less than 1"wg, therefore, the energy requirement is significantly less than for other (filtration) techniques."

Electrostatic Precipitator Facts

  • Electrostatic Precipitators can use up to 50% less energy than equally sized media air cleaners.
  • Unlike media air cleaners that can lose up to 50% of their airflow with a dirty filter, electrostatic precipitators see an airflow drop of less than 5% when dirty.
  • Systems can be designed to achieve up to HEPA-like efficiencies.
  • Landfill requirements are almost non-existent as the electrostatic precipitator prefilter and ionizer/collection cell are washable and reusable, unlike other air filtration technologies.
  • Electrostatic Precipitators are considered “Green” technology due to their lower energy usage, high efficiency, and minimal landfill requirements.