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Is the LENOZ certificate compulsory?
Who issues LENOZ certificates?
What financial aid can be obtained with a LENOZ certificate?
What does a LENOZ certificate contain?
What is LENOZ?
Do I need an electricity meter for my heat pump?
Can I also use my heat pump for air conditioning?
What should I look out for when choosing a geothermal drilling company?
Can a geothermal probe cause an earthquake?