Moved into a new home, and my fireplace has this dial under it; What does this mean? I think “auf” in “on”? But what does “zu” mean? (I am not fluent in German im sorry I am still learning.)

by Anxiety_Muffin13

3 comments
  1. What type of fireplace are we talking about? Like wood fired?

    This could be opening (AUF) or closing (ZU) a bypass valve to the chimney. In AUF it would therefore be easier to get a fire going but then should be switched to ZU so the hot air takes a longer route.

    But as said, hard to say without more details on the fireplace.

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