The innovative design is safe, easy to install, consumes less energy and provides the added benefit of low running costs. Add a phenolic resin work surface for high chemical and moisture resistance. Only Erlab offers a ductless fume hood that guarantees safety by: Adhering to the highest safety standard in the world for ductless fume hoods - AFNOR NFX 15-211: 2009 as recognized by ANSI Z9.5-2012. This standard guarantees that the emissions concentration at the filter exhaust will always be lower than 1% of the Threshold Limit Value (TLV) Providing a published chemical listing with the retention capacity for our filters Evaluation and approval of the chemical handlings performed A Certificate of Validation verifying the chemical usage, filter type, and filter lifetime. Ext: 31 1/2 x 22 x 39 3/4 min 47’’ maxi. Int: 30 1/8 x 19 x 26 1/2