Ideal holding temperature: 175ºF to 185ºF (80ºC to 85ºC)
Most all the volatile aromatics in coffee have boiling points well below that of water and continue to evaporate from the surface until pressure in the serving container reaches equilibrium. A closed container can slow the process of evaporation.
Ideal serving temperature: 155ºF to 175ºF (70ºC to 80ºC)
Many of the volatile aromatics in coffee have boiling points above 150ºF (65ºC). They simply are not perceived when coffee is served at lower temperatures.
Ideal holding time:
20 minutes in an open top decanter / 60 minutes in a closed container.
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