Beverage dispenser for mixing and dispensing hot and cold beverages

A beverage dispensing unit comprising:

• an upper cabinet configured to house a first plurality of beverage containers, a cold beverage chassis, a hot beverage chassis, and one or more user interfaces configured to receive a beverage request from a user;
• a lower cabinet configured to house a second plurality of beverage containers;
• a flash heater including a boiler configured to heat water and one or more beverage coils configured to be submerged in the hot water to heat one or more beverages respectively disposed in the beverage coils;
• a cold exchange unit containing a water tank and a second beverage coil contained within the water tank to chill a beverage contained with the beverage coil;
• and
• a flash chiller configured to chill water and circulate cold water to the cold exchange unit to fill the water tank;
• wherein the hot and cold beverage chassis are configured to receive and mix one or more base liquids, a plurality of flavor liquids, and a gas based on the beverage request from the user.