Maximum comfortTechnical requirements:
intelligent measuring system (iMSys)
To use a dynamic electricity tariff, a smart electricity meter is required that records consumption at short intervals and transmits the data in the correct format.
These meters enable precise recording of consumption and accurate billing, which is necessary for dynamic tariffs.
Heat load calculation included
The heating load calculation is the decisive step for an economical and comfortable heating system. Our specialists will be happy to calculate your individual heating load and find the optimum solution for your home.
Smart home devices and automation (optional)
Appliances that can be controlled in their electricity consumption (e.g. heat pumps or electric cars) can maximise the benefits of a dynamic tariff.
Exclusive electricity tariff
Secure additional low-cost electricity for your heat pump with our Natur-Power Wärmepumpe PLUS tariff. Here you receive a reducedbasic price for the initial contract term.
Our network for your convenience
To ensure maximum convenience for you, we at Wärmepumpe PLUS work together with the Giessen district craftsmen's association and the Giessen guilds. That means:
- Large network of regional and certified tradespeople
- No long waiting times - we arrange a specialist company within a very short time
- SWG as a central point of contact - we take care of communication with all the trades involved
Secure your PLUS now and benefit from our broad network of specialists.
Natural Power Base
Is it important to you to obtain your electricity from renewable energies? Do you want the flexibility to decide which tariff suits you best? Then the Natur-Power Basic tariff is the best choice for you.
- 100 % green electricity from renewable energies
- Flexible with a short cancellation period
- Renewable generation
Use our tariff calculator and take a look at the offer tailored to your individual needs.
What are the advantages of a heat pump?
According to the Federal Environment Agency, around 80% of the final energy consumption of an average household is still accounted for by the provision of heat. In many cases, fossil fuels such as natural gas or oil are still used here. This is not only expensive in the long term, but also has a negative impact on the environment.
If you want to heat in a cost-effective and climate-friendly way in the long term, you would be well advised to switch to renewable energies. Such as a heat pump. These systems work like a refrigerator in reverse: they extract heat from the environment, such as the air, ground or water outside, and bring it into the house. There they transfer the heat to the heating system.
FAQ
Heat pumps transport heat from the ambient air, groundwater or the ground into buildings. A refrigerant that flows in a closed circuit absorbs heat and vaporises in the process. A compressor driven by electricity compresses the now gaseous refrigerant, causing its temperature to rise significantly. This increase in temperature due to pressure is the central point. This is because in another component, the condenser, the refrigerant releases heat energy to the heating system at high pressure and therefore high temperature. It then returns to a liquid state and, after the pressure and thus also the temperature have been lowered again in the expansion valve, it can once again absorb heat from the environment.
Due to their design, air-to-water heat pumps are less expensive than groundwater or geothermal heat pumps. They draw their energy from the ambient air and convert it into heat to heat rooms and provide hot water. They are an environmentally friendly and economical alternative to conventional heating systems. In 2025, almost 300,000 air-to-water heat pumps were installed across Germany, significantly more than gas condensing boilers, which were the most popular heating system in Germany for a long time.
Heat pumps are able to generate heat even on icy winter days, even if their efficiency decreases as the outside temperature falls. This is why the vast majority of appliances have an electric heating element as standard. This is a type of immersion heater that starts up when the heat pump's output drops and supports the heat pump.
The annual coefficient of performance (COP) indicates the ratio of the useful heat generated to the electrical energy used. It therefore describes the efficiency of the system over a full year. A system with a seasonal performance factor of 4 therefore generates an annual average of four kilowatt hours of heat with just one kilowatt hour of electricity.
In real operation, the SPF in Germany is between 3 and 3.5 - or even higher for well-planned systems that are customised to the building. Important to know: The SPF is not a fixed value, but a practical figure that depends on various factors. In addition to the respective outside temperatures, usage behaviour and various technical aspects play a role that must be taken into account during planning.
Air-to-water heat pumps are considered to be extremely reliable. Experience from countries where heat pumps have been the standard for much longer shows that the appliances work for 20 years and longer without any problems. Even under difficult conditions - for example in Sweden or Switzerland. In addition, heat pumps score points for their noticeably lower maintenance requirements compared to oil and gas. Most manufacturers recommend annual checks. However, unlike oil or gas burners, these are not mandatory. And regular tank cleaning and visits from the chimney sweep are not necessary either.
Heat pumps are usually powered by green electricity. This means that from day one, they save 100 per cent of the CO2 emissions caused by heating and hot water preparation. How high the absolute savings are therefore depends on the original system that had to make way for the heat pump. In a typical old single-family home, several tonnes of CO2 can usually be saved each year.
Yes, the costs for a heat pump are eligible for subsidies. In Germany, there are subsidies of up to 70 per cent of the purchase price when switching from an oil or gas heating system. Our energy consultants at the SWG customer centre on Marktplatz will be happy to provide you with comprehensive advice on subsidies.
Yes - in the vast majority of cases, the switch pays off. Provided that the heat requirement is calculated correctly and the system is dimensioned accordingly. How high the savings turn out to be naturally depends decisively on the development of energy prices. One thing is certain: Fossil fuels are becoming increasingly expensive due to the foreseeable rise inthe price of CO2. On the other hand, there are special green electricity tariffs such as our Natur-Power WP, which are priced significantly below those for household electricity. Current practical examples show savings in operating costs of between 50 and 80 per cent.
Incidentally, the Fraunhofer Institute's Ariadne study concluded that heat pumps will pay for themselves over 20 years in old buildings as early as 2024. In energy-efficiently renovated buildings, they pay for themselves much more quickly. And in new builds, they are the most economical alternative among individual heating systems anyway.
Air source heat pumps are usually installed outside buildings, in gardens or on terraces. In this way, they can take in air, extract the heat from it and then use it to heat both the house and the water. As a rule, the required installation area is just a few square metres plus any distance between the heat pump and the house wall. This is necessary to allow good air circulation.
In short: negligible. The outdoor unit of the heat pump does generate noise. These are around 60 decibels and are comparable to a normal conversation. The greatest noise emission occurs in the winter months. In other words, when the windows are closed and nobody is in the garden, on the patio or on the balcony for any length of time.