Sizing a steam boiler for a brewery starts with determining the facility’s maximum steam demand and identifying how steam will be used throughout the brewing process. Major loads typically include the mash tun, brew kettle, hot liquor tank, heat exchangers, steam-jacketed vessels, and cleaning systems. Each piece of equipment should be evaluated for its steam consumption, operating pressure, and duty cycle. The loads should then be totaled, accounting for equipment that may operate simultaneously. It is important to consider steam distribution losses, boiler blowdown, startup requirements, and reasonable future production growth when selecting boiler capacity. The boiler should provide sufficient capacity for the brewery’s peak demand without being excessively oversized, since frequent low-load operation can reduce efficiency and affect performance. Fuel type, available utilities, operating pressure, water quality, and local code requirements should also be considered. A qualified boiler engineer or manufacturer can review the calculated load and recommend an appropriately sized boiler and steam system.