Garage Vent - Improve air quality, and rid your garage of unwanted humidity, moisture, mold, mildew, odor, and contaminants. With a simple DIY installation process and a turn of the dial, you can maintain your desired climate and feel confident in storing your valuable tools, sporting goods, vehicles, and equipment in a climate controlled space free of harmful humidity. The Garage Vent comes in 3 different sizes to fit your square footage needs. GVHC125 - 1,600³ ft - 1 stall garage – 125 cfm. GVHC225 - 3,200³ ft - 2 stall garage – 225 cfm. GVHC300 - 4,800³ ft - 3 stall garage – 300 cfm. We highly recommend the Pro-Kit, which is our pre-assembled, professional installation toolkit that has everything you need to make installation quick and easy. The Pro-Kit can be purchased for an additional cost and includes the following: Zircon StudSensor Pro SL-AC 3 in 1 (9V battery not included), 10” Pilot Bit, 165mm Hole Saw, Hole Saw Arbor, Pilot Bit & Spring, Extra Pilot Bit (just in case), 1/4” Magnetic Drive, #2 Philips 4” Magnetic Drive, 3 oz. 100% Silicone, Safety Glasses.