Charco Filters Plus eliminate 99.5% of all odors using 100% Virgin Activated Carbon. Featuring pre-installed flanges and a 180°F maximum operating temperature, our filters stand apart from the competition. Designed specifically for indoor gardening, our filters purify the air and eliminate any odors. These high-quality filters provide your plants with the clean air they require by filtering out mold and other particles that could affect or destroy them.