Standard kettle vs variable-temperature kettle

The first equipment upgrade that changes the tea rather than the convenience, and whether it is worth it depends entirely on what you drink.

equipment

What is being compared

Point by point

AspectKettleTemperature-controlled kettle
What it doesBoils.Holds a set temperature.
Matters most forNothing in particular.Green tea, white tea and gyokuro above all.
WorkaroundBoiled water left standing a few minutes, or poured between vessels.Not needed.
Worth it ifYou drink black and dark tea only.You drink green tea regularly.

The short answer

For black tea alone it changes almost nothing. For Japanese green tea it is the difference between the tea working and not.

Not a ranking. TeaHQ publishes no ratings and does not know your occasion.

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