MEMBRANE DIFFUSER CEILING
A downflow containment booth constructed with a membrane diffuser ceiling is shown on the right. The membrane diffuser ceiling construction ceiling has a narrow light weight frame to support the light weight membranes. This method results in a minimal dead air zone. Lights are located above the membranes, which results in no dead air zone below. The result is shown above using a smoke generator. The OEL in the operator’s breathing zone is <20 ug/m3. An operator standing below the narrow frame junction between two membranes will not breathe powder from dispensing or sampling.