如果有不结露，确保罐子足够温暖(75 ~ 85f)。

If there is no condensation, make sure the jars are warm enough (75 to 85f).

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因此在进入烟囱之前，必须被再度加热而使烟囱不结露，因此烟气换热器就被运用了。

Before entering the existing stack the flue gas has to be reheated to protect the stack against condensates. For reheating the gas gas Heater (GGH) is used.

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