Why Are Kettles Not Efficient?

Kettles are helpful for boiling water which is then used for making tea, coffee etc. It’s an essential thing for busy people who don’t have much time to

Why Are Kettles Not Efficient

Kettles are helpful for boiling water which is then used for making tea, coffee etc. It’s an essential thing for busy people who don’t have much time to make tea on the stovetop.

Different varieties of kettles are present such as electrical kettle which is commonly used. The reason is it has some unique features as compared to stove kettles.

The kettles are 80- to 90% efficient. The heating elements are 100% efficient because the energy supplied is converted to heat. The efficiency of the kettle is reduced due to the heat being scattered or transferred to the body of it.

Here we discussed the main reason for the decrease in efficiency of the kettle and which kettle is less efficient. This article also helps you to find the best way through which you make your kettle more efficient.

Does the efficiency of the kettle matter?

The efficiency of the kettle matters more efficient the kettle the faster is to boil the water. Electrical kettle or stove kettles are mostly used but the electrical kettle is more efficient.

Why an electrical kettle is more efficient?

The various types of kettles have different efficiencies in boiling water which kettle boil the water more efficiently. An electrical kettle is more efficient to absorb heat and boil water faster.[1]

An electrical kettle has no pot inside or lids on the upper surface like other kettles. It’s made up in a way that the water inside has a direct connection to the heating elements.

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It takes 2.5 minutes to boil water and consumes electricity of about 0.004 kilowatts per hour. In this way, we calculated that the average efficiency of an electrical kettle is about 81%.

Also Read: Should You Leave Water In A Kettle Overnight?

Which thing makes the kettle less efficient?

The main thing which reduces the efficiency of an electrical kettle is limescale. It’s naturally occurring minerals deposition present in hard water.

When the limescale started found in the kettle more energy was needed for the boiling process. In this way, limescale builds up on heating elements and blocks the transfer of heat.

You prevent your kettle from the limescale which makes your kettle less efficient by the cleaning process. Additionally, the hidden elements clean your kettle and make it more efficient.

Also Read: What Should You Not Do With An Electric Kettle?

How can we know what this kettle is?

All the kettles have some efficiency in boiling water. If you want to know which kettle is more energy efficient then you need to acknowledge the tricks mentioned below.

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  1. Cup measuring system: The kettle’s energy efficiency matter on how many cups you need to boil and how fast the kettle boils it. If the kettle consumes more electricity then it is less energy efficient.
  2. Importance of hidden elements: When the limescale is built up in a kettle the hidden elements clean the heating elements from it and make them work more efficiently. In this way, it takes more time and does not work properly it’s a less efficient kettle.
  3. Keep warm inside function: When you boil the water three to four times in a kettle it’s still cold after a few seconds. then it’s a less efficient kettle than the other because it can’t save your time or energy.
  4. Control of temperature: You don’t need to boil properly for the cup of coffee. Setting the temperature of about 90 degrees C is enough for making a cup. The kettle that has a temperature setting function is more energy-saving and efficient.

Also Read: Can I Have A Kettle In My University Room?

How much energy efficient is an electrical kettle?

When you go to buy a kettle you must keep in mind all the tricks mentioned above. An electrical kettle is more energy efficient because it’s all according to what you want.[2]

  • Time saver: It boils water in 125 seconds to save you time and energy. It boils the 135ml litres of water at 83C in about 2.5 minutes.
  • Not easily damaged: The limescale is not built up in an electrical kettle because it has a direct connection to water and has hidden elements which clean the heating elements inside.
  • Capacity to keep the water warm: An electrical kettle is made up of insulated material which keeps the water inside warm for the long term as compared to other kettles.
  • Express temperature setting: It has a temperature setting outside. It controls the temperature and also has an on or off switch which is automatically off when water is about to boil.

How can we fix the efficiency of the kettle?

You need to have knowledge about these things that keep your kettle efficient by following the tips which are described below.

  1. Boil the specific amount of water in the kettle that you need. Cover the elements of the electrical kettle.
  2. It’s an important thing to put the lid on the kettle. It keeps the heat in the pot and turns the heat down when the water is about to boil.
  3.  Turn off an electrical kettle when it’s not in use. It saves your electricity and kettle efficiency.
  4. Never leave the water inside the kettle for a long time. It builds up the limescale which damages the heating and reduces the efficiency.[3]

Also Read: Can I Put Cold Water In An Electric Water Kettle?


The electrical kettle is more efficient and energy-saving than the others. The other kettles have lids or pots inside them for boiling water and keeping it warm.

The fast boiling process keeps the kettle more efficient. On the other way, the deposition of minerals on heating elements can reduce the efficiency of the kettle.

The tricks such as control or temperature, cup measuring system, and role of hidden elements to clean the limescale and capacity to keep the water warm inside are things that give you a hind of which kettle is more efficient.

Clean the kettle regularly to prevent it from limescale and the best temperature setting can increase the efficiency of your kettle.


Q: Why does my kettle seem less efficient over time?

A: The efficiency of a kettle can be influenced by several factors. One common reason for reduced efficiency is the accumulation of mineral deposits, such as limescale, inside the kettle.

These deposits can build up on the heating element and other internal components, reducing the transfer of heat and slowing down the boiling process. Regular descaling or cleaning of the kettle can help maintain its efficiency.

Q: Are there other reasons for a kettle’s reduced efficiency?

A: Yes, the material of the kettle can also impact its efficiency. Some materials, like stainless steel, tend to be more efficient in transferring heat compared to others. Over time, wear and tear on the heating element can occur, affecting its performance.

Additionally, using the wrong size of kettle for your needs may lead to energy wastage. If you frequently boil small amounts of water, using a smaller, more appropriately sized kettle could be more energy-efficient.

Q: Which formula is used to measure the efficiency of the kettle?

A: We find the efficiency of the kettle by dividing the input power used to boil water by the power of elements and multiplying it by 100. The result is in percentage. The efficiency of a kitchen kettle is 79% of which 21% is wasted as power output.

Q: Is boiling water in a kettle more energy efficient?

A: An eco kettle can use 20% less energy per boil. While an electrical kettle is 70%  energy efficient to boil water. It also consumes more electricity to boil water every time.

Q: Why do we say the kettle is inefficient?

A: All energy is not given to water for heat. The kettle heats itself and the water. But when the water inside the kettle is about to boil then some of the heat is extended out. 

Q: Do certain kettle features impact energy efficiency?

A: Yes, features like rapid-boil technology, automatic shut-off, and energy-efficient heating elements can contribute to a kettle’s overall energy efficiency.

Q: Why are some kettles considered inefficient?

A: Certain kettles may be deemed inefficient due to factors like excessive energy consumption, slow boiling times, or heat loss during operation.

Q: What contributes to the inefficiency of some kettles?

A: Inefficient kettles may have design flaws, inadequate insulation, or heating elements that don’t optimize energy transfer, resulting in longer boiling times and higher energy consumption.

Q: Are electric kettles more efficient than stovetop kettles?

A: Generally, electric kettles are more efficient than stovetop kettles. They often heat water faster and use less energy because the heating element is directly immersed in the water.

Q: How can I identify an inefficient kettle?

A: Signs of an inefficient kettle include slow boiling times, excessive heat loss, or a higher-than-average energy consumption compared to similar models.

Q: Can the material of the kettle affect its efficiency?

A: The material can influence efficiency. Kettles with good insulation, such as those made with double-walled construction, tend to retain heat better and are more efficient.

Q: Are there specific features that indicate an efficient kettle?

A: Efficient kettles often have rapid-boil technology, accurate temperature controls, and good insulation. Look for energy-efficient labels or certifications when purchasing a kettle.

Q: Do environmental considerations contribute to kettle inefficiency?

A: Environmental factors, such as the source of electricity used to power electric kettles, can indirectly impact their overall efficiency. Using renewable energy sources contributes to environmental sustainability.

Q: How can I improve the efficiency of my kettle?

A: To enhance efficiency, choose a kettle with modern features like rapid-boil technology, regularly descale it to prevent mineral buildup, and use the appropriate size for your water needs.

Q: Are there regulations or standards for kettle efficiency?

A: Different regions may have energy efficiency standards or labels for appliances, including kettles. Check for compliance with local regulations or look for energy-efficient certifications when purchasing.

Q: What factors contribute to the inefficiency of certain kettle models, and how can users identify features or specifications that may indicate a lack of energy efficiency?

A: Explore specific factors that can make kettles inefficient and provide guidance for users to identify these aspects when choosing a kettle.

Q: How does the material and design of a kettle impact its overall efficiency, and are there certain materials or features users should prioritize to ensure a more energy-efficient appliance?

A: Discuss the influence of materials and design on kettle efficiency, highlighting features or materials that contribute to a more energy-efficient appliance.

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