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Kitchen Chimneys
chimney buying guide

how to select an effective kitchen chimney

07 Jan 2020

Proper ventilation and circulation of air is important in any fireplace to keep the surroundings safe from harmful smoke and provide fresh air draft to facilitate the burning flame. In a similar fashion, chimneys are necessary and play an important role in any kitchen, keeping the cooking area free of strong odour, heat and oil reduce. But for the chimney to be efficient and be able to perform well, it is vital to select the appliance appropriate to your needs.

A. Kitchen chimney size guide

The kitchen chimney must be placed directly above the gas stove to cover the complete area which will expel heat, so that the chimney can take in the hot air rising above and collect the oil and smoke effectively. For these purposes, it is essential to buy a chimney at least the size of the gas stove, or larger, but definitely not smaller. Standard sizes available are of 60cm and 90cm, suitable for 2 to 4 and 3 to 5 burner stoves respectively. To leave room for a gas stove upgrade, you can buy a chimney larger in width than your existing stove.

B. Calculate kitchen chimney suction power/capacity

Ultimately the power and effectiveness of the chimney will be determined by the suction power. The thumb rule for a chimney suction power calculator is to multiply the volume of your kitchen into 10, meaning that the appliance must be able to process 10 times the volume of the kitchen area in an hour. So if your kitchen volume is 40m3, then you at least need 400m3/hr of suction power.

C. Selecting which type of Kitchen Chimney to go for

As you will find yourself scrolling through catalogues from different brands and manufacturers, you will notice how these simple and common kitchen appliances have complex classifications and designs to suit every purpose. There are many ways you can classify your kitchen chimney, based on properties like;

a. Design

On the basis of its external structure and appearance, chimneys can be categorised into;

  • Hood chimney

    These chimneys have a hooded shaped, covering the entire area directly above the gas stove in an attempt to inhale as much fume and smoke rising above from the cooking range as possible. The unwanted hot gas is expelled out using ducting pipes.
  • Straight-line chimney

    Designed similar to split air-conditioners, they has straight-line bodies which don’t come with ducting pipes. Instead, they treat the air and suspended smoke particles and throw it back into the kitchen area.

b. Installation/Mount

Three different installation types can also help distinguish between types of chimneys;

  • Wall-mounted chimney

    The kitchen chimney is supported against a wall, or two walls, as in corner-mounted chimneys.
  • Ceiling-mounted chimney or Island chimney

    The chimney hangs down from the ceiling, directly above the cooking range. It is often seen in Island-style modular kitchens.
  • Built-in chimney

    Chimney is built into the interior of the kitchen, completely hiding the body and ducting pipes of the system.

c. Ducting

All chimneys don’t have the same mechanisms of functioning. Broadly, there are two technologies used in kitchen chimneys.

  • Ducted chimneys

    As best understood in hooded chimneys, these styles of kitchen chimneys filter the heavy oil and spice particles from the smoke collected and expel out the hot air from a vent.
  • Ductless chimneys

    On the other hand, as in straight-line chimneys, these kitchen chimneys filter out heavy oil and spice particles from the smoke collected, treat the strong pungent odour by passing the smoke through carbon filters, and then expel out the treated air back into the cooking area. No ducting pipes are required in these systems.

D. Installation of kitchen chimney

There are other variables which must be kept in mind which can affect the effectiveness of your kitchen chimney;

  • More number of bends, longer length and smaller kitchen chimney outlet pipe size will provide hindrance in throwing the smoke out of the kitchen. It’s always advisable to have broader straight pipes installed close to the vent so that maximum smoke is eliminated with having to travel long distance.
  • Non vegetarian food and strong flavourful cuisines like barbeque and Indian food use a lot of oil, heat and spices and produce more odour and smoke. Considering these, a chimney installed in kitchen cooking vegan continental food would require much less suction power than, say a Bengali non-vegetarian kitchen cooking fish in mustard.
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