The boiling speed of a glass electric kettle depends on several factors, including:

Wattage: The wattage rating of the electric kettle is a primary determinant of boiling speed. Higher-wattage kettles heat water faster than lower-wattage ones. A higher wattage means the kettle can draw more power from the electrical source, resulting in quicker heating.

Quantity of Water: The amount of water you put in the kettle directly affects the boiling speed. A full kettle of water will take longer to boil than a kettle with a smaller quantity of water. It's important to note that filling the kettle with just the amount of water you need can help save time and energy.

Initial Water Temperature: The starting temperature of the water also plays a role. If you're starting with cold tap water, it will take longer to boil compared to using warm or hot water from the tap.

Kettle Design: The design and efficiency of the heating element in the kettle can impact boiling speed. Kettles with well-designed, efficient heating elements distribute heat evenly and boil water faster.

Quality of Insulation: Some electric kettles are designed with better insulation to retain heat, keeping the water hotter for longer. Kettles with poor insulation will lose heat more quickly, potentially slowing down the boiling process.

Altitude: Boiling speed can be affected by your geographical location and altitude. At higher altitudes, water boils at a lower temperature due to reduced atmospheric pressure. This means that, in high-altitude areas, it may take slightly longer for water to come to a boil compared to sea-level locations.

Lid Usage: Keeping the kettle's lid closed during heating can help trap heat and increase boiling speed. An open lid allows heat to escape, potentially slowing down the process.

Water Quality: Hard water with mineral deposits can slow down boiling due to the insulating effect of mineral buildup on the heating element. Regularly descaling the kettle can help maintain optimal heating efficiency.

Maintenance: The condition of the kettle, including the cleanliness of the heating element and interior, can affect boiling speed. Regular cleaning and maintenance can help ensure efficient performance.

The boiling speed of a glass electric kettle depends on a combination of factors, including wattage, water quantity and temperature, kettle design, insulation, altitude, lid usage, water quality, and maintenance. Understanding these factors can help you optimize the boiling speed for your specific needs.