You'd have to ask how they do this in one of the European countries that has this kind of system. I suppose for rent you might need to register the rental (not

You'd have to ask how they do this in one of the European countries that has this kind of system. I suppose for rent you might need to register the rental (not a bad idea for landlords to be registered), and for the heat pump perhaps the installer would claim the discount. As I don't live in one of those countries, I don't know exactly how it works.