Ductless laboratory fume hood performance is regulated by ASHRAE Standards 54-1980 Gas Filtration for Laboratory Fume Hoods. It is the most prevalent of laboratory equipment variation, and has its own advantages.
Homeowners often have to choose between a sealed system or an exhaust ducted system.
Benefits of a sealed hood:
It is the lowest priced solution. It can be more quiet. It can exert...
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