[Ashurato]

We have a water boiler specifically for tea that has three settings, 175, 195, and 208 degrees F. It was rather expensive, but we're avid tea drinkers and considered it a good investment (and it certainly was) and good for other things too.

But if you use a kettle (or even boil water in a pot), it doesn't have to be fancy and just use the right temperature to steep it at. Just make sure to also have a thermometer so check the water before steeping in the tea.