æelements

Extractor

An extractor, or cooker hood, sits above the hob and clears steam, grease and smells, either ducting the air outside or filtering it back into the room.

What is it?

The extractor, or cooker hood, clears steam, grease and cooking smells from the air above the hob. It sits over the hob and either ducts the air outside through a vent, or filters it and sends clean air back into the room. It keeps the kitchen fresher and stops grease settling on surfaces and units.

Extractors work in one of two ways, ducted out to an outside wall, which clears the most, or recirculating through a charcoal filter where no outside route is possible. Performance is measured by the extraction rate in cubic metres an hour, and the hood should match the width of the hob and how much you cook.

  1. 1Extractor

What does it do?

Clearing steam, grease and smells
The extractor pulls the air rising off the hob through a grease filter, taking out steam, grease and cooking smells before they spread through the kitchen.

Ducting out or recirculating
It either sends the air outside through ducting, which clears the most, or filters it through charcoal and returns clean air to the room where there is no outside route.

Lighting the hob
Most hoods also light the cooking area from above, giving a clearer view of the pans as well as better air.

Where is it used?

Over the hob on a wall

The usual position, mounted on the wall above a hob set into the run.

Over an island

Suspended from the ceiling or rising from the worktop where the hob sits in an island away from a wall.

Hidden in a cabinet or hob

Built into a wall cabinet above the hob, or into the hob itself as a venting hob, for a clean, discreet look.

Types

Extractors are grouped by how and where they mount, from a visible chimney to one hidden in the hob itself.

Chimney hood

Wall mounted with a visible chimney flue above, the classic style in stainless steel or glass. Powerful and a design feature in its own right.

Integrated and canopy

Hidden inside a wall cabinet above the hob, showing only a slim pull out or nothing at all, for a streamlined look that keeps the units continuous.

Downdraft

Rises up from the worktop behind the hob when needed and drops away when not, avoiding anything overhead. It suits islands and open plan kitchens.

Ceiling and island hood

Suspended from the ceiling over an island, working as a design feature as well as an extractor where there is no wall behind the hob.

Venting hob

Extraction built into the hob itself, drawing steam down through the middle, which removes the need for a hood above entirely. This is the same appliance covered under the hob element.

Typical sizes

Match the hood to the hob width and the size of the kitchen.

FeatureTypical figure
Widthmatch or exceed the hob, 600 or 900 mm
Extraction ratemeasured in cubic metres per hour
Ductingcommonly 150 mm
Mounting heightper the hob maker, higher for gas
Supplya fused power point

How to specify

Choose the extractor alongside the hob and the kitchen layout, since it must match the hob width and either duct outside or filter and recirculate.

  1. Ducted or recirculating
    Decide whether it can duct out to an external wall, which clears the most, or must recirculate through a charcoal filter. This depends on the route available.

  2. Style and size
    Pick the style to suit the position, wall, island or hidden, and size it to match or exceed the hob width for good coverage.

  3. Performance and noise
    Choose an extraction rate suited to the size of the room and how much you cook, and check the noise level, since more power usually means more noise.

Other considerations

Ducted or recirculating. Ducting outside clears far more than recirculating, but needs an external route. Recirculating is easier to fit but less effective.
Extraction rate. Match the rate to the room size and cooking style, as an underpowered hood will not keep up.
Mounting height. Follow the hob maker's minimum height above the pans, which is higher for gas than electric.
Noise. Higher power settings are louder, so check the decibel figure if the kitchen is open plan.
Filters. Grease filters need regular cleaning, and recirculating hoods also need their charcoal filters replaced.
Ducting run. Short, straight duct runs work best; long or bendy runs cut the airflow.

Interacting elements

The extractor works closely with the hob and the units around it.

  • Hob the extractor serves it, unless a venting hob does the job through the middle.
  • Wall and ceiling units a hood mounts to or hides inside these.
  • Ducting runs from the hood to an external wall on a ducted system.
  • Electrics the hood needs a fused power point.

Popular manufacturers

Elica

An Italian company and the global leader in kitchen extraction, making every style from chimney and ceiling hoods to downdrafts, plus its NikolaTesla venting hobs. Strong on design and quiet, efficient motors.

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Bosch

A reliable, well engineered range of hoods across the main styles, with features like Hob Hood control that links the hood to a Bosch hob so it adjusts extraction automatically.

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Neff

Design led hoods that suit fitted kitchens, including integrated and island models and venting hobs, from the same group as Bosch.

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For learning only. The details and products shown are typical examples, not a design for your building: check the Building Regulations, the maker’s instructions and a qualified professional before you build. Product names belong to their makers, who don’t endorse this site.