A hallmark of our HCM helical coil heater is high efficiency. This conserves fuel to greatly reduce operating costs. Our HCM helical coil heaters approach the theoretical limits of thermal efficiency possible in fired 2-pass heaters. Their efficiencies range up to 85 percent LHV, depending upon fluid outlet temperature, fuel and options.
When an optional Stackpack economizer is used, the exhaust gases preheat the thermal fluid, boosting efficiency even more.
Efficiency is a measure of a heater's input vs. its output (See diagram below.) The more of the input that ends up in the output, the higher the efficiency. It is theoretically impossible to reach 100 percent efficiency because there will always be some heat loss through moisture and through the shell walls. However, the amount of heat absorbed by the coil and the amount lost through the shell can be controlled by careful design and construction.