How to Use a Temperature Control Kettle for Tea and Coffee
By Buy Kettles, Toasters, Irons & More Online | Russell Hobbs UK | Published: 2026-10-15
Category: How-to Guides
Learn how to use a variable temperature kettle to brew green tea, black tea, and pour over coffee at their ideal heat settings, with a step-by-step routine and common mistakes to avoid.
Quick answer
Use a temperature control kettle to match water heat to your drink: around 70–80°C for green tea, 90–96°C for black tea and pour over coffee, and 100°C for herbal infusions. If your kettle has presets, start with the closest setting, then adjust by taste. The Russell Hobbs Addison Temperature Control Kettle gives you five digital heat settings and a keep-warm button, so you can set a temperature once and top up without reboiling.
Why water temperature changes the taste of tea and coffee
Water that is too hot scalds green tea and delicate white tea, pulling out bitterness and muting the sweet, vegetal notes. Water that is too cool under-extracts black tea and coffee, leaving them flat and sour. A variable temperature kettle lets you pick a number instead of guessing from the steam or waiting and hoping. The practical range you will use most is 70–96°C, with a full boil reserved for herbal blends and for sanitising the kettle itself.
Set your starting temperatures by drink
These are sensible starting points, not strict rules. Adjust by 2–3°C on your next brew if the cup tastes bitter or weak.
- Green tea: 70–80°C
- White tea: 75–85°C
- Oolong: 85–90°C
- Black tea: 90–96°C
- Pour over coffee: 90–96°C
- Herbal and fruit infusions: 100°C
Use the keep-warm function for top-ups
If you drink several cups in a row, the keep-warm button on the Addison kettle holds your chosen temperature so you are not reheating a full boil each time. This is especially useful for green tea, where a second steep at the same temperature tastes more consistent than one made with freshly boiled water. Remember that keep-warm holds temperature; it does not reheat cold water, so start with enough water for the cups you plan to make.
Clean the filter and descale regularly
Temperature accuracy drifts if the element or filter is coated in limescale. The Addison kettle has a removable, washable anti-scale filter that keeps water clear and is easy to rinse under the tap. In hard water areas, descale every four to six weeks using a proprietary descaler or a 50/50 water and white vinegar solution, then boil fresh water twice and discard before brewing.
Step-by-step: brewing with a temperature control kettle
- Fill to the minimum line and place on the base: Use fresh cold water and fill above the minimum mark so the element is covered. Common mistake: filling below the minimum, which can cause the kettle to cut out early or boil dry. Checkpoint: the water window should show enough water for all the cups you plan to make.
- Select your temperature before switching on: Choose 70–80°C for green tea, 90–96°C for black tea or pour over coffee, and 100°C for herbal infusions. If your kettle has presets, pick the closest one. Common mistake: boiling first and then trying to cool the water by waiting, which is imprecise. Checkpoint: the illuminated button confirms the setting you have chosen.
- Heat and wait for the kettle to switch off: Let the kettle reach the set temperature and click off before pouring. Do not lift it early. Common mistake: pouring while the kettle is still heating, which gives you water that is hotter or cooler than intended. Checkpoint: the kettle has switched off and the indicator light shows the cycle is complete.
- Pour over the tea leaves or coffee grounds: For tea, pour once the water has stopped bubbling to avoid scalding delicate leaves. For pour over coffee, wet the grounds evenly in a slow spiral. Common mistake: pouring from a great height, which drops the water temperature and disturbs the bed unevenly. Checkpoint: the grounds or leaves are fully saturated with no dry patches.
- Press keep-warm for a second cup: If you want another cup, press the keep-warm button to hold the temperature instead of reboiling. Common mistake: leaving keep-warm on for hours, which wastes energy and can make the water taste flat. Checkpoint: use keep-warm for top-ups within the same drinking session, then switch off.
- Rinse the filter and descale when needed: Remove and rinse the anti-scale filter weekly. Descale every four to six weeks in hard water areas, or sooner if you notice a chalky film or slower boiling. Common mistake: ignoring limescale, which affects both taste and temperature accuracy. Checkpoint: water should look and taste clean, with no visible scale on the element or filter.
Product facts
- Addison™ Temperature Control Kettle: The Russell Hobbs Addison Temperature Control Kettle has 5 digital heat settings and a keep-warm function for top-ups. Five settings cover the useful range for green tea, black tea, and pour over coffee, while keep-warm means you can brew a second cup without waiting for a full reboil.
- Addison™ Temperature Control Kettle: It has a removable, washable anti-scale filter. Rinsing the filter regularly keeps water clear and helps maintain consistent brewing temperatures, especially in hard water areas.
- Addison™ Temperature Control Kettle: The matte black finish has illuminated buttons. Illuminated buttons make the selected temperature easy to read at a glance, which reduces the chance of brewing green tea with water meant for black tea.
