Smeg KLF04 Variable Temperature Kettle Review


There is no denying that the Smeg KLF04 Variable Temperature Kettle is one of the most elegant kettles we’ve reviewed, integrating perfectly with other Smeg kitchen appliances. Beyond appearances, this kettle also offers the performance you need, with variable temperature settings available to allow you to prepare a wide range of drinks at the correct temperature. Its keep warm function is also convenient because it keeps the temperature for long periods. The disadvantage is the price, but if you want a flexible and powerful kettle, the kettle Smeg KLF04 is an excellent choice.


  • Elegant retro design
  • Variable temperature setting
  • Quiet
  • Keep warm function

Key specifications

  • Price of the opinion: $199.95
  • 1.7 liters
  • Adjustable temperature from 50ºC to 100ºC
  • Removable anti-scale filter
  • 20-minute warm-up function
  • 27.5 x 17.1 x 22.6 cm
  • 73cm cable

The KLF04 Variable Temperature Kettle from Smeg is part of the company’s range of high-end appliances. Available in eight colors, it features Smeg’s 50s retro-futuristic design, in keeping with the aesthetics of the manufacturer’s refrigerators, toasters and coffee machines.

You can adjust the temperature to your liking, provided it is between 50ºC and 100ºC. It also offers a warming function that will essentially warm your water, keeping the chosen temperature up to 20 minutes. But you can only activate the function during the heating process.

However, this kettle has a rather high price, which makes it ideal for those who are very attentive to the temperature of their water.

Smeg kettle KLF04 – What you need to know

  • Boiling performance: The KLF04 takes a little longer than average to boil – just under 3 minutes. Variable temperature settings produce accurate results with a variation of approximately 2ºC.
  • Keep warm: The warming mode maintains the desired temperature for up to 20 minutes, but you must remember to activate it during the heating process. If the function is not activated, the kettle tends to lose heat faster than its rivals.
  • usability: The lid opens by pressing a button. The kettle is easy to fill and the water indicator has a useful number of marks.
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Smeg KLF04 Kettle

The Smeg KLF04 kettle is elegant and robust – but also expensive

Given its clean lines, the Smeg KLF04 is surprisingly heavy at just over 1.3 kg (pitcher only). It features a stainless steel body of the color of your choice and a comfortable, metallic handle – though it is a bit prone to fingerprints.

Press the lid button and it opens completely, although slightly. The water indicator is located behind the handle and features clear markings of 0.5, 1, 1.5 and 1.7 (MAX), with two additional increments of a quarter-liter marked by simple lines.

Other metallic details include the spout and the base of the kettle, which has all the controls.

Smeg KLF04 Kettle

Choose a temperature, and the kettle Smeg KLF04 adheres

On one side of the base, one row of LEDs represents the available temperature range: 50ºC, 60ºC, 70ºC, 80ºC, 90ºC, 95ºC and 100ºC. You can choose your preferred temperature by moving the lever on the left or right side.

To the left of the lever, you will find the power button and right, the keep warm button. Keep in mind that the keep warm button will only work after you have started the heating process.

If you leave the function on, the kettle will gently boil your water from time to time for 20 minutes. You can cancel this at any time.

Smeg KLF04 Kettle

In my tests, KLF04 heated the water to precisely chosen temperatures, with a maximum variation of about 2ºC. The keep warm function keeps the temperature constant for 20 minutes. I did not notice that a temperature drop 30 minutes after boiling, which means about 10 minutes after the keep warm function is off.

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Without the keep warm function enabled, the KLF04 Smeg Kettle cools faster than competitive models

Without the keep warm function, the KLF04 is cooled much faster than the Artisan kettle with variable temperature of the same price.

After 20 minutes, one liter of boiled water at 100 ° C was about 78 ° C for Smeg and 80 ° C for KitchenAid. After 30 minutes, this difference increased to 70 ° C for Smeg against 75 ° C for KitchenAid, and after one hour, it was 57 ° C against 65 ° C.

Smeg KLF04 Kettle

The kettle Smeg KLF04 warms the water gently – and you can mute the end of cycle

The KLF04 kettle has proven to be one of the quieter ones I’ve tested. It boiled a liter of water at 100 ° C in just under 3 minutes while remaining below 72.5 dB.

But at the beginning and end of the heating process, as well as when you plug it into a power outlet and when you touch the temperature lever for the first time, the kettle produces rather loud sound effects.

Smeg KLF04 Kettle

Although this signal may be useful in a noisier environment, it sounds loud enough in a quiet home. This can be easily disabled with the Mute function, which can be activated by pressing the keep warm button for five seconds.

Why buy Smeg KLF04 kettle?

If you want an elegant, variable temperature kettle with a keep warm function and you have the necessary cash, the Smeg KLF04 could be for you. For a more affordable variable temperature kettle, however, the Sage Smart Kettle offers similar functionality at about half the price – but with a narrower temperature range.

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Smeg KLF04 Variable Temperature Kettle Review
Smeg KLF04 Variable Temperature Kettle Review 1

Verdict There is no denying that the Smeg KLF04 Variable Temperature Kettle is one of the most elegant kettles we've reviewed, integrating perfectly with o

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