Design
The design in which the electric kettle is decorated. In addition to
the classic design, nowadays there are more original styles, namely:
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Retro. Devices stylized antique — mainly for kitchen utensils of the 30s — 50s of the XX century. The degree of stylization in this case can be different: for example, some appliances are not different from ordinary kitchen kettles that are placed on the stove. Also note that almost all samovars are performed in retro style (see "Type"). But thermopots and teapots in this design are almost never produced. Anyway, a retro kettle will be indispensable for a kitchen in the same style, but it can also fit into a modern interior.
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Hi-tech. The devices that have a technological, sometimes even futuristic design — using unpainted metal, transparent glass, as well as a minimal amount (or even complete absence) of decorative details. At the same time, the design can be quite unusual: for example, there are models that taper upward and vaguely resemble laboratory flasks. Like the retro style, almost no other devices are produced in this style other than classic kettles.
When choosing a device in a specific design, note that the design inevitably affects the cost — sometimes quite noticeably, despite the fact that it usually does not provide functional advantages.
Volume
The nominal capacity of a kettle refers to the maximum amount of water that can be safely poured into it, and it is typically indicated by the water level indicator. In the case of brewing sets (see "Type"), the nominal capacity refers to the main kettle, while the capacity of the teapot is listed separately (see below).
The capacity of the electric kettle directly affects the amount of water that can be heated at once. A larger capacity allows for heating more water, but this also means the kettle will be larger and heavier. Additionally, heating a larger volume of water requires either more power or a longer time. Therefore, it is important to consider one's actual needs when choosing a kettle based on its capacity. For example,
mini-kettles for travelling (or for one person) have a volume of up to 1 liter. For home use in a family of 2 – 3 people, a 1,5 – 2 liter model is enough. Devices for
2 – 3 liters are already well suited for a small office or a similar situation. The most spacious electric kettles are designed to hold 10 liters or more, and are typically used in public places such as canteens and cafes for dispensing hot water.
Double-walled
Double-walled are found mainly among traditional electric kettles.
This design performs several functions at once. First of all, it significantly improves thermal insulation, allowing the kettle to retain heat longer and save energy when heating. Also, double-walled increase strength and reliability — it is more difficult to break through such a wall or noticeably damage it than a single one. And in some models, the outer side is made of plastic, and the inner side is made — of metal; this allows you to combine the advantages of both materials without a significant increase in cost.
Display
The own
display noticeably simplifies and facilitates the use of the kettle. Most often, this is the simplest single-colour screen, capable of displaying 2 — 3 figures and possibly the individual special symbols — however, in this case, more is not required. The display is especially convenient when selecting and controlling the heating temperature — after all, it is much more convenient to navigate by specific numbers than by simpler devices like colour indicators. Actually, the presence of a screen almost 100% guarantees that this model is also equipped with a thermostat.
Backlight
Decorative lighting of the body or capacity of the kettle. It has mainly aesthetic value — it improves the appearance of the device. Sometimes it can serve as a kind of indicator, for example, change the colour when water is boiling.