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The Importance of a Coffee Filter Machine For the best results you should make sure to use water that's filtered that is clean and fresh. This allows the distinct flavors of coffee beans to shine through. A filter machine is more economical in the long run because you just need to purchase ground coffee and paper filters. It is also possible to save money on cleaning and disposal costs. Filtered Water Many espresso and coffee machines come with a filter system. Some machines use filter systems th