A fume cupboard, also known as a fume hood, is a ventilated enclosure used in laboratories to draw harmful fumes, vapours, and dust away from the user and safely out of the working area.
What is Fume Cupboard?
A fume cupboard is a safety enclosure with a built-in ventilation system. As a user works with chemicals inside it, a fan draws air through the cupboard and carries airborne hazards such as fumes, vapours, mists, and dust away from the person, either exhausting them outside or filtering them before recirculating the air.
A movable front panel called a sash lets the user reach inside while acting as a protective barrier. Fume cupboards are central safety equipment wherever volatile, toxic, or odorous substances are handled.
Why It Matters
Many laboratory chemicals release fumes or vapours that are harmful to breathe, and some reactions can splash or release dust. Without proper ventilation, these hazards accumulate in the room and put everyone at risk. A fume cupboard contains and removes them at the source.
A fume cupboard helps by:
- Drawing harmful fumes and vapours away from the user
- Containing splashes, spills, and reactions behind the sash
- Reducing the build-up of hazardous airborne substances in the lab
- Protecting users handling volatile, toxic, or odorous chemicals
- Supporting a safe and compliant working environment
It is one of the most important pieces of safety equipment in a chemistry-based lab.
Where It Is Used
Fume cupboards are used wherever hazardous substances are handled, including:
- Chemistry teaching and university labs
- Research and development laboratories
- Pharmaceutical and chemical facilities
- Pathology and clinical labs
- Quality-control and testing labs
- Industrial process and analytical labs
Any lab working with volatile or toxic chemicals typically needs at least one.
Types & Configurations
Fume cupboards come in several main types, defined by how they handle the extracted air:
- Ducted fume cupboards – exhaust contaminated air to the outside through ducting.
- Ductless / recirculating fume cupboards – filter the air and return it to the room, avoiding external ducting.
- Walk-in fume cupboards – tall enough to bring large equipment or apparatus inside.
- Low-flow / energy-saving cupboards – designed to reduce the volume of air extracted.
- Specialised cupboards – built for specific hazards such as strong acids or perchloric acid.
The right type depends on the chemicals used, the building’s ventilation, and safety requirements.
How to Choose
When selecting a fume cupboard, consider:
- Chemicals handled – the substances determine whether ducted, ductless, or specialised is required.
- Ducted vs ductless – ducted suits a wide range of chemicals; ductless avoids external ducting but depends on suitable filters.
- Size and sash type – match the working space and access to your apparatus.
- Airflow and performance – ensure the cupboard provides safe, consistent extraction.
- Construction material – chemical-resistant interiors for the substances in use.
- Installation and ventilation – confirm the building can support the chosen system.
Because a fume cupboard is safety equipment, selection should always be matched carefully to the hazards involved.
Frequently Asked Questions
What is the difference between a fume cupboard and a fume hood?
They are the same thing. Fume cupboard is the common term in some regions and fume hood in others, and both describe a ventilated enclosure that removes hazardous fumes.
What is the difference between a ducted and ductless fume cupboard?
A ducted cupboard exhausts air outside through ducting, while a ductless cupboard filters the air and recirculates it into the room.
What is the sash on a fume cupboard?
The sash is the movable front panel that lets the user reach inside while acting as a protective barrier against splashes and fumes.
Does every lab need a fume cupboard?
Any lab handling volatile, toxic, or odorous chemicals typically needs one; labs that don’t work with such substances may not.
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