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New heating rules 2025: This is how tenants can reduce their additional costs now!
Find out everything about the new heating regulations in Bremerhaven, which have been in effect since October 2025. Changes are coming for tenants!
New heating rules 2025: This is how tenants can reduce their additional costs now!
Since October, new rules for utility billing have been in effect in Germany, which primarily affect tenants in houses with central heat pumps. How North24 reported, the so-called heat pump privilege is no longer valid. This means that landlords now have to precisely record their tenants' energy consumption and bill them individually - flat-rate additional costs are a thing of the past. What matters in the future is that only those who heat less will pay less.
The new regulation aims to create more transparency and fairness in energy costs. Special measuring devices that record actual consumption must be installed in affected residential buildings. Landlords are legally obliged to retrofit this technology in a timely manner. Anyone who fails to do this must expect legal consequences.
Opportunities through heat pumps
An interesting solution for the heat transition are heat pumps, which pay particular attention to efficiency and environmental friendliness. The acquisition costs for these devices are in the five-figure range. However, there are government subsidies that can return part of the investment, such as Test.de informed.
In the 2025 heat pump test, five air-water heat pumps were evaluated that are also capable of heating old single-family homes. However, the efficiency of these heat pumps depends heavily on the insulation of the house and the heating system - whether underfloor heating or radiators. This can result in differences of several hundred euros per year in electricity costs.
Evaluation and efficiency
How does the whole thing actually work? Efficiency is often indicated by the annual performance factor (JAZ), which describes how many units of heat are gained per unit of energy used. For example, a JAZ of 4 means that the heat pump emits an average of 4 kilowatt hours of heat per kilowatt hour of electricity. A JAZ of at least 3 is considered efficient. The higher the proportion of renewable energies in the electricity mix, the more climate-friendly the operation of the heat pump becomes Consumer advice center.
The coefficient of performance (COP), which also measures the ratio of energy used to heat obtained, is less meaningful than the JAZ. For efficient use, it is recommended to pay attention to this when installing a heat meter. This shows the heat given off in kilowatt hours and can be used to calculate the JAZ.
High-performance heat pumps available on the market not only vary in their energy efficiency, but also in the noise level of their outdoor units, which typically range between 40 and 50 dB. An important factor to consider if neighbors are affected!
With the new regulation of additional costs and the growing importance of heat pumps, tenants are now required to think intensively about their heating behavior. This makes it clear: If you have a good hand in selecting and installing heating systems, you can not only protect the environment, but also save money.