Blacksmith Coffee Roastery loves vacuum, or siphon brewers, as they are known. These brewers extract amazing flavors out of coffee just below boiling point.
The vacuum brewing process is fascinating to watch. Heated water from the bottom chamber is forced to the upper chamber, where it is mixed with coffee grounds. When the brewer is removed from the heat source, the vacuum that forms in the bottom chamber draws the brewed coffee back down through a filter, resulting in excellent-tasting coffee. The flavors extracted from the vacuum brewing process are second to none! The coffee is full flavored and full bodied yet clear, without the sediment found with a French press.
Because it operates by a vacuum principle, just below the boiling point, the coffee is always infused at the precisely correct temperature every time, and over-extraction is easily avoided.