Phat Filter, 4" x 20", 350 CFM

Keep your grow room smelling fresh with Phat Filter. It uses virgin activated carbon (the best carbon on the market) to eradicate particles and odors from the air effectively. We have a laboratory test number to prove this. Here is the simple math: Carbon quantity * carbon quality = Filter capacity Quantity: The thickness of the carbon bed is 2 inches. So, it packs more carbon into the filter. Quality: The quality of the Phat filter is backed by science and math. ADsorption Yield is the key. How to find the ADsorption Yield? Dry Apparent Density * Butane Number = ADsorption Yield Note: High aDsorption yield means the high capacity to absorb odors and will have a longer life. This greenhouse filter comes with a pre-filter to get rid of the large-sized air particles. Carbon is machine-packed tightly for enhanced surface area and porosity. Conical base and aluminum mesh offer uniform and high air movement. Specifications: SKU/Model No.: HF-IGSPF204 Brand: Phat CFM Rating: 350 Color: Silver Product Dimensions: 9 x 9 x 24 inches Item Weight: 18 pounds Warranty: 1 Year