The Labconco Protector XStream Fume Hood takes containment, safety and energy savings to the extreme. This general chemical, high performance fume hood was independently tested and challenged well beyond the SEFA-1 standards. With a face velocity of 40 fpm and sash fully open, the Protector XStream was subjected to 50 fpm cross drafts, NIH protocol, and tracer gas measurements in the chest of the mannequin. In all scenarios, the Labconco Protector XStream Fume Hood allowed 0.00 ppm average level of tracer gas outside the fume hood. Although your safety officer will determine the actual face velocity setting for your laboratory, the ability of this hood to contain under these adverse conditions sets a new standard of safety.