Glass electric kettle increase thermal insulation through design features and materials that help retain heat more effectively. Here's how they achieve improved thermal insulation:

Double-Walled Construction: Some glass electric kettles feature a double-walled design. In this construction, the kettle has two layers of glass with an insulating vacuum or air gap in between. This double-wall design acts as a barrier to heat transfer, reducing heat loss to the environment.

Insulation Layers: Many glass kettles have insulation layers or materials incorporated into their design. These layers surround the heating element and the water chamber, serving as a thermal barrier to keep the heat generated by the heating element inside the kettle.

High-Quality Thermal-Resistant Glass: Premium glass electric kettles use thermal-resistant glass that is engineered to minimize heat transfer. This glass is designed to withstand high temperatures and maintain its insulating properties, reducing the conduction of heat from the hot interior to the cooler external surfaces.

Sealed Lid: A well-fitted, sealed lid on the kettle plays a crucial role in preventing heat loss. When the lid is closed, it creates an additional insulating layer that traps heat inside the kettle, reducing heat loss through the top opening.

Energy-Efficient Heating Element: Modern electric kettles often use energy-efficient heating elements that heat water quickly and efficiently, reducing the time during which heat is generated and potentially lost.

Base Insulation: The kettle's base, where the heating element and electrical components are housed, may be thermally insulated to prevent heat from escaping downward.

Auto Shut-Off Feature: Many glass electric kettles are equipped with an auto shut-off feature that turns off the heating element once the water reaches the boiling point. This helps reduce unnecessary heating and heat loss after boiling.

Keep Warm Function (Optional): Some glass electric kettles include a keep-warm function, which can maintain the water's temperature for a period of time after boiling. This minimizes the need to reheat the water and further reduces heat loss.

Ergonomic Handle Design: A well-designed handle is usually cool to the touch and comfortable to grip. It allows users to handle the kettle without being exposed to excess heat.

These design features and materials work together to enhance thermal insulation in a glass electric kettle, making it more energy-efficient and effective at retaining heat. As a result, the kettle can heat water quickly and maintain the temperature for a longer period, providing convenience and efficiency to users.