Schaefer's shutter style exhaust fans offer an energy efficient solution to meet low to medium exhaust airflow requirements.These exhaust fans work perfectly in thin-walled buildings requiring exhaust fans with a low profile such as greenhouses. Features: Low profile makes fan ideal for thin-walled buildings and where space is limited.Aluminum blade and rugged pvc shutter provides durability and longer life.Heavy-duty motors are totally enclosed and maintenance free for worry free use.Fan mounts flush to the exterior wall.Variable speed when used with optional speed controls - not included with fan.
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