Immediately after filling in your postal code and house number you will see what your energy label is. After the calculation you can contact installers directly.
The Iris tool lets you calculate the saving potential of a home. You can use it to look at sustainable implementations and calculate how much they will cost. That way, you can make your own home more sustainable without needing to have relevant technical know-how yourself.
As soon as the calculation has been made, you can contact installation companies immediately. And by filling in your postal code and house number you can see which energy label your home has right away.