He wonders whether additional regulations are necessary to get the Netherlands to have hybrid heat pumps. “Due to the high gas prices, the number of hybrid pumps has increased significantly. You could also briefly observe the operation of new subsidy schemes and increased gas prices.” Van Hoek: “And if you have regulations, you have to arrange everything. And when is a house suitable or not? It is not so black and white, because you can adapt some houses, but there are higher costs involved. When does the obligation apply?”