Laboratory Fume Hoods

Laboratory Fume Hoods for Defined Applications

A laboratory fume hood should be selected from the process and chemical risk assessment, not from cabinet width alone. Review the substances handled, quantities, operating temperatures, work practices and frequency of use before comparing ducted, filtered or application-specific configurations.

Coordinate the Hood with the Building

Ducted systems require coordination with exhaust, make-up air, discharge location and room pressure strategy. Filtered systems require a documented chemical compatibility review, filter selection, monitoring and replacement plan. Neither approach is suitable for every application, and the responsible laboratory safety and engineering teams should approve the final selection.

Provide the required internal workspace, service fixtures, sash and control needs, work surface material, installation location and available utilities. Confirm access for inspection, testing, maintenance and filter or fan service. The room layout should also account for doors, traffic, supply air and equipment that could disturb containment.

Request a fume hood project review with your chemical list, room plan and ventilation information.

For system selection context, review the ducted vs ductless fume hood guide. Final hood type, exhaust, filtration, controls and room requirements should be confirmed for the intended application.

Frequently Asked Questions

Is a ductless fume hood as safe as a ducted fume hood?

Safety depends on matching the complete system to the actual hazard, operating limits and maintenance program. Neither ducted nor ductless fume hoods are automatically suitable for every process. The responsible laboratory safety and engineering teams should approve the final selection.

Can I add a new chemical to an approved ductless fume hood later?

Only after a new application review. A filter selected for the original process may not control a different substance, higher quantity, changed temperature or new reaction product. Update the approved chemical list and operating limits before changing the work.