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3-Stage Filtration System & Just 4
The filtering material of the Air-T-Rex is thermally fused around a galvanized wire ring
This filter was specifically designed for an easy retrofit into a typical 2" furnace filter track to increase efficiency
Humidifier dust
Hair spray
nutone hepa filter P102-1856_thickness_5/16 3-Stage Filtration System & JustMain HEPA filter for HEPA air cleaner. Installs between prefilter and postfilter. Lifespan: 5 years Note: This filter fits newer units and has foam on the bottom of the filter. If your filter has foam on the sides of the filter, use W5 0860.
