Often imitated but never duplicated, Schaefer’s Americ confined space ventilators are the industry standard when it comes to providing safe and reliable ventilation in any confined space working environment. These blowers are rugged and reliable while providing unrivaled performance to ensure a safe, comfortable and controlled environment in the most extreme areas. Features and Benefits: Industry leading airflow in all sizes, rated from 750-10,000 cfm. Dual wall polyethylene housing designed to withstand the harshest of conditions, providing of durability and dependability. Premium quality motors rated for over 100,000 hours of heavy-duty, continuous use for unmatched return on investment. Safety tested to UL, CSA and CE certifications, exceeding industry standards. Positive and negative airflow (blows and extracts). Lightweight for easy portability. Stackable to save storage space. Extensive line of accessories for ease of use and storage.