The type of heating element installed in the electric kettle.
—
Spiral. The heating element of the kettle is a coiled tube located at the bottom of the kettle. This option is relatively inexpensive, but it requires that the spiral is always covered with water during use to prevent overheating and potential damage. Additionally, it can be challenging to manually clean the spiral from scale and other debris, although there are alternative cleaning methods available such as boiling water with certain products.
—
Hidden. The hidden heating element is situated beneath the bottom of the kettle, meaning that the whole bottom functions as a heater. This design is regarded as more advanced compared to the open coil option. It is safe to operate with nearly any quantity of water, as long as the bottom is covered. Additionally, such heaters are significantly easier to clean. However, compared to open heaters, the hidden option is more expensive and produces more noise during use.
