This depends on your circumstances: If the “product travel distance” between the fridge and dispenser is less than 1 meter you do not, but the system must be cleaned daily. If the “product travel distance” is greater than 1 meter, you require a chiller. However, the advantage is our system only needs to be cleaned once per week. If you’re based in the USA and require NSF accreditation, you are required to have a chiller.