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Kettles image (Kettle Components (Body (High grade steel, Made using a…
Kettles 
Size
1.5-1.7L commoncapacity, up to 7 cups
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Can get 2L capacity, 8cups
Kettle Components
Handle
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Low density plastics; Polypropylene, Polyethylene, used as its thermally insulating
Base
High grade steel, stainless steel
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Spout
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Generally made from same material as body, or steel
Body
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Low density plastics: Polypropylene, Polyethylene,often use alongside steel,insulates water increasing boiling
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Lid
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Either have a release button, or a plastic handle, to remove lid
Switch
Switch that is pressed to start boiling, automatically switches off when boiled, or an off switch
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Heating Element
Nichrome; wire, strip, ribbon
Must have high resistance (to corrosion), high melting point
Anti-limescale Filter
All kettles must have this filter, it should be easily removable for cleaning
Mesh filter found near the spout, that stops any limescale getting into the cup
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Environment
Must boil water efficiently, to reduce energy usage
Certain parts of product can be recycled after use, but not all
Reduce waste material and energy resources used up by using most efficient process during manufacturing
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Function
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Must keep temperature of water up, insulated
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Customer
Must have a handle to suit both left and right handed people, 360 degree rotational base
Fast boil time, 3000watts takes 2-5mins
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Cost
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The greater the price of the kettle the greater the quality and longer the life span of a kettle should be
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