Which machine category uses a wash solution temperature of 150 degrees Fahrenheit?

• A. Stationary rack, dual-temperature machine and multi-tank, conveyor, multi-temperature machine
• B. Single tank, conveyor, dual-temperature machine
• C. All other machines
• D. Spray-type ware washers

Answer: (A)

In warewashing, the wash water temperature is tied to the machine type and the sanitation method it uses. Some machines are designed to operate effectively with a wash temperature around 150°F, particularly those that rely on a combination of machine design and chemical sanitizers rather than pure heat to sanitize.

Stationary rack units, dual-temperature machines, and multi-tank conveyor systems with multi-temperature capabilities are built to run with a 150°F wash. This temperature is hot enough to loosen soils but works in tandem with sanitizing approaches other than the hottest hot-water cycles. Spray-type ware washers, on the other hand, typically require higher wash temperatures to achieve sanitation purely through heat, so they don’t use 150°F for the wash step.

So, the categories that use a wash solution temperature of 150°F are stationary rack, dual-temperature machines, and multi-tank conveyor machines with multi-temperature configurations.