Heating, Ventilation & Air-Conditioning CERAP UK has a strong expertise in nuclear ventilation and offers various services related to filter and ventilation system testing. Filter system test HEPA Filters Efficiency TestIodine Absorption Unit Tightness and Efficiency Test Gas and particles tracing Flows Measurement – Flowmeters Representativeness (Stack and Duct)Facilities, Tapping of HEPA Filters Location and Sampling Line Qualification (Atmosphere Release Measurement)Ambient Beacon Location Control (Migration Time)Facilities Aeraulics Characterization (Dead Zone Identification and Renewal Rate) Ventilation devices test Glove Box and Containment Building/Chamber Tightness Test and Leak DetectionLocal Ventilation Devices Test