According to the Rheinische Post, the IW investigation suggests that opting for heat pumps could maintain stable heating costs over the long term, potentially saving over €1,000 annually in partially renovated older apartments compared to gas heating. The new heating law eliminates the requirement for new heating systems to operate at least 65% on renewable energy sources, allowing continued installation of gas and oil heating systems. However, starting in 2029, these systems must increasingly incorporate climate-neutral energy sources such as biomethane or bio-oil.