The machine itself is large, but not as monstrous as some of the other grinders I tested. It's also very bottom-heavy, which makes it feel more durable than other machines and means it won't rattle all over your counter while grinding. The heavy-duty translucent plastic collection cup generates less static cling than the glossy clear plastic cups I tested, and the chute that connects the burrs to the cup collects less debris than other models. Cleaning is simple: Just remove the top burr and use the included wire brush to remove residual grounds.
An early variant technique, called a balance siphon, was to have the two chambers arranged side-by-side on a sort of scale-like device, with a counterweight attached opposite the initial (or heating) chamber. Once the near-boiling water was forced from the heating chamber into the brewing one, the counterweight was activated, causing a spring-loaded snuffer to come down over the flame, thus turning "off" the heat, and allowing the cooled water to return to the original chamber. In this way, a sort of primitive 'automatic' brewing method was achieved.
It can take a little while to get to know the ins and outs of a new coffee maker. In CR’s labs, each drip coffee maker we test brews roughly 65 cups by the time our engineers are through with it. And brewing is just one of many aspects we look at. We test for handling and convenience, too, so you can choose a model that helps you sail through morning madness.