External Hot Carbonator HC300 1, 2ltr. - External Hot Carbonator HC300 1ltr. - External Hot Carbonator HC300 2ltr. The HC300 is an External Hot Carbonator, also known as a Hot Carbonating Unit, and it represents the ideal solution for producing sparkling water when paired with a water cooler. Designed to meet the needs of bars, diners, and small to medium-sized restaurants, it ensures consistent, stable, and high-quality carbonation. Key Features 0.950 L or 1.750 L Carbonator Perfect for mee