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Guide to Warewashing & Janitorial Equipment
Energy Efficiency & Insulation
Booster heaters — whether internal or external — consume a significant amount of energy
due to the high temperature requirements. However, well-insulated booster heaters can
mitigate energy loss, improve recovery time between cycles, and reduce long-term utility
costs.
Look for models with:
• Foam-in-place or fiberglass insulation
• Thermostatic controls to prevent overheating
• Low standby heat loss ratings
• Fast recovery time (especially important for conveyor systems)
Some advanced systems also include digital temperature displays and error code
diagnostics, helping operators monitor performance and proactively manage service
needs.
Scenario
Booster Heater Requirement
High-Temp Dishwasher (Undercounter/
Door- Type)
Required (internal or external)
Conveyor or Flight-Type
Required, often external
Low-Temp Dishwasher
Not required, unless upgrading to high-temp
Ventless High-Temp Unit
Will have internal booster + condenser
Institutional or Volume Kitchens
Strongly recommended external booster for faster
recovery
A booster heater is more than just an add-on — it’s an essential piece of the
sanitization process. Whether you’re selecting a new high-temp machine or
upgrading an existing setup, understanding the placement, performance, and
maintenance needs of your booster heater ensures that your dishroom operates
efficiently, safely, and in compliance with health standards.
Your RED Dealer can help you size and select a booster heater that matches your
machine’s flow rate, local water temperature, and dishroom volume — and advise
whether an internal or external unit best supports your long-term operations.