Air Vent Filter 4"x10" Activated Charcoal Carbon Floor Heater Filter Sheet

: Insert our activated charcoal air filter into the air vent registers to purify the air coming from your AC units and heaters | : 24 Pack of 4" x 10" Activated Charcoal Carbon Air Filter Sheet for home 4 x 10 Inch | : 4x10 inches. Easily trimmed with scissors to the size you need. Our newest activated carbon filter has been thickened and its density has been increased by approximately two times, thereby increasing the odor elimination effect by 50% | : Floor, wall, ceiling, and baseboard register & grilles in bedrooms, offices, schools, hospitals, or any living space | : For best performance, it is recommended to replace the charcoal filter every 3-6 months