Bunn-O-Matic came out with a different drip-brew machine. In this type of coffeemaker, the machine uses a holding tank or boiler pre-filled with water. When the machine is turned on, all of the water in the holding tank is brought to near boiling point (approximately 200–207 °F or 93–97 °C) using a thermostatically-controlled heating element. When water is poured into a top-mounted tray, it descends into a funnel and tube which delivers the cold water to the bottom of the boiler. The less-dense hot water in the boiler is displaced out of the tank and into a tube leading to the spray head, where it drips into a brew basket containing the ground coffee. The pourover, water displacement method of coffeemaking tends to produce brewed coffee at a much faster rate than standard drip designs. Its primary disadvantage is increased electricity consumption in order to preheat the water in the boiler. Additionally, the water displacement method is most efficient when used to brew coffee at the machine's maximum or near-maximum capacity, as typically found in restaurant or office usage. In 1963, Bunn introduced the first automatic coffee brewer, which connected to a waterline for an automatic water feed.
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These organizations consider how long it takes you to brew the coffee, the social impact of the coffee maker, as well as the roasting ability of the coffee maker. The best coffee maker will be BPA free and certified. An SCAA certified coffee maker, for example, will be able to deliver water at optimum temperatures throughout the whole brewing process, without compromising the integrity of the coffee at any point.
The simplicity starts with its design: a single button with a scrolling dial underneath an LED interface. That button is the only one on the entire machine. With it, you set the time, set the water temperature, set how many cups you want brewed, and when you want the brewing to start. It takes a second to get the hang of it, but we were impressed with how intuitive it is — a stark contrast to a machine like the Moccamaster KBT 10-Cup Coffee Brewer, which had so many extra pieces, it required constant consultation of the instruction manual.
Help yourself to cafe-quality coffee every morning. Whether you're brewing coffee for two or making enough coffee for family and friends, the Hamilton Beach 12-Cup Programmable Coffee Maker is the perfect size and offers many features to fit your brewing needs. This full-size coffee maker looks great on the counter with a stainless steel design that fits right in with any kitchen.