Can you say a bit more about your technique of obtaining the right water temp? I understand 10 seconds, but are you using a clear glass kettle, where you can see when the water is just starting a few bubbles vs. a full "rolling" boil which did not give me the result of the Technivorm brewing temp. I know water boils at 212°F which I assume would be associated with a "rolling/full" boil whistling kettle.
Boyd's has this Brewing Guide description on their site:
Gourmet Coffee Shop has this guide....but there is just starting to bubble, and a full boil that is not distinguished.
Sure Lux,
The way I produce hot water is using an electric hot water kettle. I used a Braun for years until it started to fall apart. About a year ago I bought an Oster stainless electric hot water kettle that has served fairly well, but it is not the holy grail. (more about that later)
The Oster heats the water until it reaches a rolling boil then throttles down to a hot water hold setting at 190F.
Since 212 is too hot and 190 is too cold, somewhere in between is just right. Brewing coffee with too hot a water temperature will yield the characteristic rancidy over extracted flavor, while using too cool of a water temperature will yeild too thin tasting a brew, lacking the full bodied flavor that good coffee is capable of producing. I could monitor the temperature with a probe, but c'mmon, we don't want to go overboard do we?
Subjectively, I experimented with waiting for different amounts of time, and came upon what works best for me. After the water has come to a boil, the sound of the boiling eventually subsides. 10 seconds after complete silence is when I begin my pour. I leave the 190F warmer on to slow the further rate of cooling until I'm done with making my cup of coffee.
BTW, I do use filtered water. Good water, is, as many say, an essential component of good coffee.
My next hot water kettle will be the Breville 820 which lets one choose the exact temperature. Check the link below. On the site, they have a short demo video:
http://www.williams-sonoma.com/prod...g&cm_cat=NexTag&cm_pla=default&cm_ite=default
The Breville Variable Temperature Water Kettle is a tea lover's dream come true for quickly and conveniently heating water to specific temperatures for precision brewing tea. This 1500-watt electric kettle has 5 pre-set brewing temperatures, for Green Tea (175° F),
White Tea (185° F), Oolong Tea (195° F), French Press (200° F) and black tea and boiling (212° F). It features a stylish brushed stainless steel multi-directional base and jug, left and right handed water level indicators with blue backlighting, can hold temperatures up to 20 minutes and a removable scale filter. The hard part is figuring out what to actually drink. 1.8
Liter
Fast boil 1500 watt concealed element
Allows for precision tea and coffee brewing to elicit the perfect drinking profile
Water level indicators are located on both sides of the kettle for the left and right handed viewing
Blue backlight behind water window
Brushed stainless steel base and jug
Multi-directional base
Removable Scale Filter
Cheers!