Question 1 of 40
Walking Character
2%
Princess Right

Wie oft sollten die meisten Hausbesitzer eine professionelle Wartung der HLK-Anlage (Heizung und Kühlung) einplanen?

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A Alle 5 Jahre
B 1–2 Mal pro Jahr
C Nur wenn sie kaputt geht
D Jeden Monat
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