The new Building Modernization Act has been in effect since July 29, 2026, and stipulates:

• A functioning old heating system does not have to be replaced and may continue to be operated.
•  Freedom of choice for new heating systems: District heating, heat pumps, and wood pellet heating systems—as well as gas and oil—are permitted.
• However: Starting in 2029, the proportion of biogas and bio-oil in new gas or oil heating systems must increase gradually, reaching 100 percent by 2045.
• It is unclear whether the quantities required for this will be sufficient and whether they will allow for cost-effective heating operation.

1. Is district heating available in my neighborhood?

• District heating is a climate-friendly alternative to oil and gas.
• You can use ESWE Versorgung’s availability check to see if it’s an option for your building and express your interest directly there.

2. Is a heat pump an option?

• Heat pumps use heat from the air or the ground and can therefore replace fossil fuels.
• Whether a heat pump is suitable for your building depends, among other things, on your heating needs, the building’s energy efficiency, and the existing heating system.
• A qualified energy consultation can help determine which solution makes the most sense.

3. What will the heating system cost in the long run?

• It’s not just the initial purchase price that matters: Energy and maintenance costs, as well as potential incentives, should also be factored into the decision about a heating system.

• Heat Wisely: Lowering the room temperature by just one degree can reduce energy consumption by six percent.
• Ventilate properly: Give the room a good airing out for a few minutes several times a day, rather than leaving the windows slightly open all the time.
• Initiate a conversation: Talk to your landlord about energy-efficient renovations and climate-friendly heating technology.

• The Wiesbaden Climate Protection Agency provides free advice to all residents on heating systems, home renovations, funding opportunities, and energy conservation. 
• Consultations are available by phone, video call, or in person at the Umweltladen, located at Luisenstraße 19. To schedule an appointment, call: 0611/313600