STAGE 1 Large Particle Pre-filter. Removes particles easily seen by the naked eye (e.g. dust, hair and pet dander)
STAGE 2 Medium Particle Pre-filter. Removes small to medium size particles (e.g. molds, spores and pollen)
STAGE 3 60 sq. ft. of True Medical Grade HEPA. Removes 99.97% of all particles larger than 0.3 microns and 95% of all particles larger than 0.1 microns.
STAGE 4 Military Grade HEGA Carbon Cloth. HEGA (High Efficiency Arrestance), providing an extremely large surface area for adsorption of chemicals, es, viruses and bacteria.
Best Value: Complete BONUS Replacement Kit including Stage 1 Filter, Stage 2 Filter, and 2 UVC germicidal lamps for the Field Controls TRIO 1000P or T..