Esco, maker of fume hoods and other solutions for controlled environments, has announced that its fume hoods have been certified to American safety standards by Exposure Control Technologies Inc., an independent testing organization. The Singapore-based Esco submitted its Frontier Acela fume hood for ANSI/ASHRAE-110 testing. The hoods are designed to deliver superior containment even at low face velocities, and are available in a variety of widths and styles.