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Guide to Warewashing & Janitorial Equipment
Many high-temp dishwashers — especially undercounter or door-type models — come
with a factory-installed internal booster heater. This integrated setup offers space-saving
convenience, reduced installation complexity, and cleaner aesthetics.
However, internal boosters:
• May be tightly integrated into the machine’s body, making repairs or replacements more
labour-intensive
• Require operators to ensure daily deliming or scale prevention, especially in hard water
areas
• Are generally sized specifically for the machine’s flow rate and cannot be easily upgraded
Despite these constraints, internal boosters are extremely popular for smaller operations
where space is at a premium, and where dedicated warewashing lines are built around a
single machine model.
Internal Booster Heaters
External Booster Heaters
External units are standalone devices
connected to the dishmachine’s final rinse line.
These are more common in conveyor, flight-
type, or converted low-temp systems, where
higher capacity and flexibility are needed.
Advantages of external booster heaters include:
• Greater heating capacity for high-throughput
systems (often rated at 12, 16, or 30 kW)
• Easier maintenance access and simplified
repair/replacement
• Upgrade potential, especially for sites
converting low-temp systems to high-temp
sanitation
• Can be paired with ventless hoods or energy
recovery systems for added efficiency
In some cases, external boosters are retrofit
additions — ideal when a kitchen upgrades to
high-temp sanitation but lacks the ability to
modify existing plumbing or dishroom layout
substantially.
Hatco C-Series Booster