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Understanding Dual Boiler Espresso Machines: A Comprehensive Guide Espresso is an art as much as it is a science. For coffee enthusiasts and baristas alike, accomplishing the best shot of espresso demands precision and control over brewing variables. One of the most reliable ways to accomplish this accuracy is through the use of dual boiler espresso machines. This article digs into the performance, advantages, and factors to consider of dual boiler espresso machines for both novices and experienced coffee connoisseurs. What is a Dual Boiler Espresso