Air Systems International Contractor Grade Ventilation Fan has flow rate of 974 cfm and free-flow rugged polyethylene housing and can accommodate a wide range of job applications. Fan has 1/3 HP with 60 Hz, 115 Volts AC rating and 10' long cord, 8" duct. Fan finds its application in confined space ventilation, boiler work, utility companies, telecommunications, construction, open trenching, electrical transformer repair, manhole entry, maintenance and tank cleaning. Fan meets OSHA 29 CFR 1910.303 and 1910.7 and CUS/CSA standards.