Think Crucial 8&rdquo; x 20&rdquo; Carbon Inline Fan Filter & Odor Control, Premium Filtration, Part # GLFILT8M; Perfect Odor Elimination in Grow Rooms, Cigarette Smoke, Emissions & More CFM RATING: 650 to sufficiently pull the odorous, unfiltered air through the filter and breathe out clean air. Perfect air speed for delicate plants that emit odors. HEAVY DUTY, DURABLE LONG LIFESPAN of 1.5 years. Install the carbon filter to the ventilation room to remove odors of the growing room, bloom rooms, or drying rooms. WORRY-FREE performance as filters, like the Navy Seals, will leave no odor survivors. ASY TO INSTALL because it is a replacement for part GLFILT8M which will fit your fan with no issues! EXCEPTIONAL ODOR & ALLERGEN PREVENTION for grow tents, grow rooms, and other indoor areas. Top filters for neutralizing allergenic pollutants, smoking rooms, foul odor emissions, pet dander, & more! NO NEED FOR OUTDOOR VENTILATION as these odor filters will completely eliminate foul odors and other air pollutants while filtering our fresh, purified air. DONT WORRY about ensuring you have ventilation leading outside, as these filters will perform the job even better.