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Cooker Hoods and Extraction

There are many types of hood/extractor available. These are listed below with full details further down the page:
Sloping hoods - Fitted against a wall and gently sloping to improve headroom
Chimney - Fitted against a wall in the classic style
Island and Pendant Hoods - Suspended from the ceiling, away from the wall, above a furniture island or peninsular
Integrated - Fitted between your cupboards and with a furniture flap door fitted to the front
Canopy Motor Units - A fixed unit that is to the underside of a wall unit, canopy or chimney breast
Conventional - A fixed depth hood that is fitted against a wall either alone or below a shorter wall unit
Telescopic - A pull-out hood that is fitted to the underside of a wall unit
Downdraft - Designed for use in an island or peninsular with a section that rises from the worktop.
Ceiling - Designed for use above an island or peninsular and fitted flush with your ceiling

The main reason for installing an extractor is to take away the smells and grease that are produced during cooking. Extractors will also help to take away the steam and heat that is associated with cooking on a hob. The dirty air passes through a grease filter first, which is normally made up of layers of aluminium mesh (metal grease filters). A few extractors do still use paper or fibre grease filters, which can be washed a few times but will eventually need to be replaced. Metal grease filters can be washed in the sink or a dishwasher, and therefore do not need to be replaced.

Correct Hood Width

It is not necessary to match the width of the hob and hood. You can fit a 900mm hood over a 600mm hob or a 600mm hood over a 700mm hob! We recommend that the hood is at least as wide as the hob for maximum efficiency. In any event furniture MUST NOT be fitted above, or overlap, a hob unless some form of extraction system is between the hob and your units.

Ducted out or re-circulating?


  


Most extractors are designed to take the dirty air through ducting and then outside. This is the best option if you can easily run ducting to an outside wall.

It is important to keep the ducting run as short as possible. Every bend or elbow in the ducting will reduce the efficiency by approximately 5%. Always use the manufacturers recommended size of ducting, normally 125mm or 150mm diameter to avoid excessive noise and limiting performance.

Ducting kits are available in flexible or rigid materials. Bear in mind that air will flow better over a smooth surface and that a crushed section will restrict the entire length of the duct.

If you cannot duct your hood to an outside wall the majority of hoods also have the facility to have a carbon/charcoal filter fitted, which will get rid of the cooking smells. The cleaned air is then blown back into the kitchen via a vent in the extractor. This does not help alleviate the problem of condensation etc. caused by steam and will slow the air-flow, but sometimes it is the only option if the extractor is not close to an outside wall.

Current building regulations require virtually all hoods fitted within new properties to be ducted out.

Avoid common ordering and installation errors....

  • If ducting out check to make sure you have an uninterrupted run to the outside wall.
  • Check for obstructions outside to ensure the ducting hole will not be restricted.
  • Ensure the ducting kit is the correct diameter for your hood. Even the slightest reduction in the recommended size will significantly increase noise and reduce the extraction rate.
  • Plan out under floor ducting for island downdraft units well in advance
  • Plan ceiling ducting for island and ceiling hoods well in advance

Remote motors

Some manufacturers offer extractors with a remote motor. This means that the motor/fan unit is not situated inside the appliance, but is fitted remotely. The remote motor is normally fitted in a loft space or on to an outside wall and is connected to the hood by a power cable. Ducting is required to take the dirty air from the hood to the motor and this must be ordered separately. The main advantage of this type of extractor is that they are a lot quieter than standard hoods. The extraction rate is also improved, and can be up to 25% more efficient.

Some models include the cost of a remote motor but many do not.

These types of unit require plenty of advanced planning so feel free to give our experts a call before ordering.
  

Avoid common ordering and installation errors....

  • Plan out under floor ducting for Island units well in advance.
  • Ensure sufficient uninterrupted space is available for ducting to be run above a ceiling.
  • Plan out under floor ducting for island downdraft units well in advance.
  • Plan ceiling ducting for island and ceiling hoods well in advance.
View our remote motors

Infrared Hood Control

   A recent innovation is infrared hood control, which completely automates the control of the cooker hood from the hob. Turn it on and the hood will turn on. A power boost on the hob will put hood on intensive speed.

Sloping hoods mounted on a wall

These are available in various sizes.
The most common are 600mm, 700mm and 900mm. There are other sizes available but these are less common.

If you opt to use a chimney section above the hood these are usually supplied in two sections. This enables them to be installed to suit varying ceiling heights.

  

Avoid common ordering and installation errors....

  • Please check ceiling heights - some sloping hoods can have adjustable chimney sections to conceal ducting, some ceilings are too low or too high!
  • Ensure that you have the correct clearance above your hob, unusually sloping hoods generally only require 450mm clearance above gas or electric hobs
  • Many sloping hoods can only be ducted out from the top with ducting running at right angles through the wall above the hood or up the wall concealed by a chimney section that is sometimes and optional extra.
  • Remember to order the ducting or recirculation filters.
  • Check extraction rates and motor noise levels to ensure the hood meets your needs.

View our range of sloping hoods

Chimney hoods mounted on a wall

These are available in various sizes.
The most common are 600mm, 700mm and 900mm. There are other sizes available – 800mm, 1000mm and 1200mm to name a few, but these are less common.
Most canopy hoods have chimneys supplied in two sections. This enables them to be installed to suit varying ceiling heights.

  

Avoid common ordering and installation errors....

  • Please check ceiling heights - even though hoods can have adjustable chimney sections, some ceilings are still too low or too high.
  • Ensure that you have the correct clearance above your hob, usually 650mm if electric 750mm if gas.
  • Ensure you order the correct type, for example an island hood cannot be fitted against a wall.
  • Remember to order the ducting or recirculation filters.
  • Check extraction rates and motor noise levels to ensure the hood meets your needs.

View our range of chimney hoods

Island Hoods

These are available in various sizes from 600mm to 1500mm.
Many island hoods have chimneys supplied in two sections. This enables them to be installed to suit varying ceiling heights. Beware of fixed height island hoods – these are often unsuitable for ceiling heights higher or lower than the average 2400mm.

  

Avoid common ordering and installation errors....

  • Please check ceiling heights - even though hoods can have adjustable chimney sections, some ceilings are too low or too high!
  • Some island hoods are a fixed height, make sure the size is suitable.
  • Remember that Island hoods must be fixed to a ceiling.
  • The fixing must be strong enough to hold the Island hood (40kg+).
  • Ensure that you have the correct clearance above your hob, 650mm if electric 750mm if gas.
  • Ensure you order the correct type, a standard hood cannot be fitted above an island. Some brands have very similar model numbers for wall and island mounted hoods.
  • Remember to order the ducting or recirculation filters.
  • Ducting out can be tricky. Check you have a clear ducting run.
  • Check extraction rates and motor noise levels to ensure the hood meets your needs.

Island hoods must be fixed to the ceiling. These hoods need to be fixed to a joist etc. in order to obtain a secure fixing. Please ensure sufficient support is available in the correct position before ordering your hood.

Please ensure that the model you order is the correct height and type.
View our range of island hoods

Integrated Hoods

This type of hood has a door mounted on the front of it. Available usually 600mm wide and normally offered in silver (not stainless steel), this type of extractor is an old favourite. A more modern solution is to install a concealed canopy motor unit or telescopic model. Details of these models can be found below.

  

Avoid common ordering and installation errors....

  • Ensure that you have the correct clearance above your hob, 650mm if electric 750mm if gas.
  • This model will require a door to match your kitchen.
  • Remember to order ducting/filters with the hood.
View our range of integrated hoods

Conventional Hoods

Conventional extractors were very popular at one time. They can be fitted to the wall above a hob, or below a shorter wall unit. These tend to be bought nowadays as a replacement for old existing extractors, and are used less in new installations. These hoods are generally not as powerful as other types and are rather old fashioned in appearance.

  

Avoid common ordering and installation errors....

  • Ensure that you have the correct clearance above your hob, 650mm if electric 750mm if gas.
  • Remember to order ducting/filters with the hood
View our range of conventional hoods

Canopy Motor Units

Also described as a motor unit, this variation is normally fitted into the base of a wall unit, canopy or a chimney breast.
Not all models will fit into the base of a standard wall unit so if this is your requirement please check carefully paying particular attention to the depth (front to back).
These products win the award as the most mis-ordered product we sell so if you are unsure please give our experts a call.

  

Avoid common ordering and installation errors....

  • Ensure that you have the correct clearance above your hob, 650mm if electric 750mm if gas.
  • Check and double check that this is the appropriate model for your requirements.
  • Remember to order ducting/filters with the hood.
  • Check the sizes, particularly the height and depth to ensure you have sufficient space.
View our range of canopy motor units

Telescopic Hoods

This style of extractor is becoming increasingly popular. These are fitted into a wall unit, and are available in various widths. The extractor motor is hidden in the unit and all that is visible is a pull out section at the bottom. In some cases you can attach a panel to the front to match your kitchen; most models are supplied with (or offer as an option) a steel fascia panel. The motor units for this type of extractor are located within the unit above.

  

Avoid common ordering and installation errors....

  • Ensure that you have the correct clearance above your hob, 650mm if electric, 750mm if gas.
  • Not all of these extractors come with a trim on the front. This is often an optional extra.
  • Remember to order ducting/filters with the hood.
View our range of telescopic hoods

Downdraft Extractors

Care must be taken in the installation of this type of extractor, but get it right and they are fabulous.
This extractor fits into the work-surface adjacent to the hob or hobs. Most often used in island installations where it is more difficult to install an extractor overhead.
The tricky area with this type of extractor is the way the ducting is installed. If it is an island installation, then the ducting has to be run under the floor. Not easy when it is a concrete floor! Some models allow the use of a remote motor within, or at the end of, the ducting run (often outside). Plan the installation well in advance and speak to our experts about the best means of ducting out.

Experience tells us that downdraft hoods work best with induction and ceramic hobs. Some manufacturers make hobs with a downdraft system built into the edge or even the centre.

  

Avoid common ordering and installation errors....

  • Remember to allow sufficient space below for the motor unit.
  • Use the correct length ducting.
  • Allow for ducting when fitted within an island unit.
  • Plan your ducting run prior to ordering.
View our range of downdraft hoods

Ceiling Extractors

Careful consideration is required for the installation of this type of extractor. If you have the space above then this hood, fitted flush with your ceiling is discreet and efficient. It there is insufficient ceiling space to house the motor section some of our customers have built a feature boxing above their island to house the extractor and lighting – we have seen (and created) some wonderful examples of this such as the example below



  

Avoid common ordering and installation errors....

  • Check that you have sufficient space within your ceiling for the hood motor.
  • Ensure you have sufficient space for ducting.
  • Use the correct length ducting.
  • Plan your ducting run prior to ordering.

Take care to consider the way the ducting is installed within your ceiling. Some models allow the use of a remote motor within, or at the end of, the ducting run (often outside). Our experts are here to help.
Some models are designed to recirculate and therefore do not require ducting.
All ceiling hoods are supplied with a remote control to control the extraction rate and lighting.

View our range of ceiling extractors

Extraction rates

   In order to ensure your hood does the job properly you need a model with the correct extraction rate for the size of your room. To do this multiply the room length x width x height (e.g. 4m x 3m x 2.5m = 30m3). Ten changes of air per hour are required so multiply you room volume by 10. (e.g. 10 x 30m3 = 300m3). This calculation tells you how many cubic meters of air your hood needs to extract per hour.

Check the required rate against the details that we list with each hood.

Once you have chosen a hood type and finish on our website you will be able to select products by extraction rate using the options on the left hand side of the website.

Noise Levels

   In today’s often open kitchens, quiet appliances can be essential. This guide will help you understand the decibel (dB) measurements listed with relevant products such as dishwashers, refrigeration and hoods.

Cleaning Appliances



We are often asked questions about keeping appliances clean. The most popular question being, How do I stop fingerprints appearing on stainless steel?.
The short answer is You can't!. That said many manufacturers use anti fingerprint stainless steel so it is far less of an issue than it was.
If baby oil on a soft cloth is used to clean the front of the oven, this will keep them at bay, but will not stop them completely. Another useful aid to cleaning is the E-Cloth. This is a cloth that manufacturers recommend to use on the exterior of ovens etc., particularly stainless steel. These cloths are similar to a face flannel, and are best used slightly damp. Some manufacturers have tried to solve the problem by using a clear lacquer, which coats the steel and protects it from our greasy fingers. This does seem to be effective.
Generally, appliances that are offered in a colour are easier to clean. Often the surfaces are glass and colour is sprayed on the back. However there are still a large number of appliances that have an enamel finish, e.g. hobs and cooker hoods. These are relatively easy to clean, but enamel/painted finishes can chip.
View our full range of hoods
Still not sure? Need more information?
Read our frequently asked questions call 01992 897804, or click here to reach us out of hours.
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