Electronic/Esp air cleaner - generates poisonous ozone Electronic/ESP Air Cleaners operate by giving a positive charge to particles in the air as the enter the unit, then trap them in a negatively charged cell. Performance is slightly better than a media filter, but these units require regular cleaning (as often as once a month) and generate harmful ozone as a byproduct of the electric current used to charge the particles. Excess ozone is one of the biggest environmental problems we face these days. Recent EPA studies show that ozone reacts chemically with internal body tissues, like the lungs, and prolonged exposure can cause shortness of breath, coughing, nausea, headaches, eye and throat irritation, and lung damage.

Media filter - misses 80% of airborne particles Media Filters which draw dirty air through a filter are simple, but largely ineffective. Regardless of whether the filter uses standard furnace filters or electrostatically charged filters to attract particles, all fail to stop the very small particles that account for as much as 80% of the airborne pollutants.

Lifebreath TFP: Best performance. Electronic Air Cleaner: Fall off in performance is very dramatic. Media Filter: Particle stopping performance is low. Electrostatic Filter: Even lower performance.