"Air Science has a wide range of products and sizes. Our lab purchased an Advanced Ductless Fume hood for the drug chemistry area. I appreciate the ease of installation, the chemical resistant worksurface and the lighting in the hood. I am able to complete sampling or extractions in the hood with ease. The port holes in the back of the hood allow for installation of small equipment in the hood without needing to cut holes or configure the hood by the end user. The value for the money was great compared to other ductless systems out on the market. I will continue to go back to Air Science for ductless products in the future."