CleanSeal EC Fan filter units consist of a backward incline EC fan motor assembly and high-efficiency HEPA or ULPA filters are combined in one unit. The fan filter units are designed to furnish Hepa filtered airflow over the cleanroom area. Our fan filter units (FFU) are used in all applications and classes of cleanroom environments, semiconductor, medical manufacturing facilities, as well as pharmaceutical labs. Cleanseal fan filter units are designed for use in Class 10 through Class 100,000 cleanroom spaces. Conforms to UL STD 507. Certified to CSA STD.C22.2 No.113.