Need better ventilation for your garage, greenhouse, or workshop? This iPower gravity shutter might be exactly what you're looking for! The 20-inch square design measures 23.43x23.43 inches overall, making it perfect for standard ventilation openings. What's really clever is how it works - the louvers automatically open when your exhaust fan starts running, then close by gravity when the fan stops. This prevents backdrafts, keeps out pests, and helps maintain your indoor temperature. The aluminum construction is seriously durable - it won't rust or corrode, even in humid environments like greenhouses or marine applications. The precision manufacturing means the louvers seal completely when closed, so you don't have to worry about water intrusion during storms. Installation is straightforward if you're comfortable with basic electrical work, since it needs to be hardwired to work with your exhaust fan. Important note though - this is just the shutter assembly, you'll need to purchase the actual fan motor and blades separately. The silver finish looks clean and professional, and the build quality feels solid enough to last for years without issues. Whether you're removing heat from a grow room, moisture from a workshop, or odors from a garage, this shutter provides that professional-grade ventilation solution without the commercial price tag. Your space will stay better ventilated and more comfortable year-round!
Free 30-day returns 
Free 30-day returns
