naSRPS EN 14175-9:2026

Fume cupboards — Part 9: Fume cupboards, ducted with filtered internal recirculation

Scope

This document specifies characteristics concerning the design and performance requirements together with type testing and on-site testing procedures especially for ducted filtration fume cupboards (DFFCs) not described in the other parts of EN 14175. Filters in DFFCs can be specific filters or a combination of filters dependent on the characteristics of the contaminants to be removed.
This part of EN 14175 is related to and refers to other parts of EN 14175 regarding definitions, technologies, testing methodologies, design factors and functional aspects and is read in conjunction with these.
This standard covers the specific layout version of ducted fume cupboards with integral filtration. These devices called ducted filtration fume cupboards can be designed to partially reuse filtered air for internal dilution. Therefore, the term “hybrid” fume cupboards is sometimes used.
Fume cupboards with associated filters are considered as standard fume cupboards according EN 14175 1 to EN 14175 3.
NOTE Their filter requirements, description and testing are listed in Annex A for information.
The requirements for fume cupboards and filters for radioactive work are described in detail in EN 14175 8.
Recirculatory filtration fume cabinets which return the filtered exhaust air back into the surrounding room are not part of this document but described in prEN 17242.
DFFCs are not foreseen for work with pathogens. Appropriate microbiological cabinets are described in the EN 12469 series.