United Rentals offers high-performance ventilation systems for use in confined and large spaces that require fresh air or the removal of toxic gases such as pipelines, tunnels, wastewater treatment facilities, buildings under construction and other areas. This model produces up to 1,600 cubic feet per minute (CFM), and we also stock sizes capable of providing up to 12,000 CFM of fresh air. These units feature blowers driven by belts and pulleys and are electric, gasoline and diesel-powered with fully automatic shut-down heat/oil. Manufacturers include Allegro, Schiller GC and other renowned name brands.