Looking to modernize or efficiently supplement your heating system? Viessmann offers customized system solutions for use in detached homes and multi-family buildings. The range includes condensing boilers powered by fossil fuels, renewable energy sources, and hybrid solutions. Viessmann also offers electric heat generators. So which heating system is right for you, how can you save energy and reduce costs, and what services does Viessmann offer for modern heating systems? On this page, you’ll find information about various heating solutions and systems, as well as important details to help you make your purchasing decision.
Upgrading your existing heating system is worth it. Our upgrade compass will show you
what technical options are available and how it pays off for you in terms of heating cost savings and subsidies for related energy sources.
If you’re considering upgrading your heating system, the first step is comprehensive preparation. This is because planning is everything. First, you need to answer a few questions. After all, there are so many heating technologies to choose from. Furthermore, it must be tailored to the building’s conditions, as well as the individual preferences and heating needs of the occupants.
So, the first step is gathering the facts. We also recommend contacting a competent Viessmann partner who will advise you on all aspects of modern heating systems. You can learn how this process can work in our video.
As mentioned, choosing a heating system isn’t easy. Ultimately, it’s not just a matter of personal preference, such as choosing between fossil fuels and renewable energy sources. It’s more about ensuring the heating system is suited to the home’s conditions, which are more stringent in existing buildings than in new construction. Among other things, it’s important to determine the heating demand. Furthermore, the heating system must be efficient. To achieve this, the boiler shouldn’t be too small or too large. One of our Viessmann partners can help you with all these issues. They are always certified heating engineers. In our guide, “Finding the Right Heating System Installer,” you can learn what to look for when choosing a partner for your heating project.
What types of heating systems actually exist, and do they meet your individual needs? Use the following checklist to narrow your search in advance. This will make the path to modern heating clearer and easier.
Gas heating provides heat to over 40 percent of German households. Its advantages include decades-proven technology, which utilizes gas particularly efficiently thanks to condensing technology and a small footprint. Wall-mounted gas boilers are particularly compact, making the heating system ideal for detached houses without a basement or boiler room, as well as for individual apartments in multi-family buildings. When making a decision, it’s also important to know: despite limited gas reserves, gas condensing technology has a future thanks to biogas and the possible inclusion of hydrogen. Furthermore, Viessmann heating systems can be combined with renewable energy heat generators to create hybrid systems.
Heating with gas is a smart solution when…
You need a heating system with proven condensing technology for fossil fuels
You have limited space to place equipment
You already have a gas connection or a liquefied gas cylinder
You need a modern heating system with a good price-quality ratio
You want to be able to combine with renewable energy sources
Looking to upgrade your gas heating system and continue heating with gas? Our condensing boilers burn safely and efficiently. Learn more here.
Read more →We explain how gas condensate technology works: what are its features and which components are important?
Read more →Condensing technology has become synonymous with optimal energy use, high efficiency, and cutting-edge technology. Read more about it here.
Read more →Condensing technology makes heating with fossil fuel oil a promising option for the future. Like gas heating, the energy stored in it is used efficiently. However, unlike gas heating, space for a fuel oil tank must be considered . The amount of space required, or the size of the tank, depends on the size and energy rating of the building, as well as individual heating needs. In fully modernized existing buildings, heating demand is significantly lower than in non-modernized buildings. Generally, a Viessmann oil-fired heating system can be operated with bio-oil and in combination with renewable heat generators.
Heating with oil is a smart solution if…
You need a heating system with proven condensing technology for fossil fuels
You are already heating with oil.
Do you have an oil tank or suitable room?
You need a reliable heat generator with a good price-quality ratio
You want to be able to combine with renewable energy sources
Hybrid heating systems utilize multiple energy sources. This allows for the combination of fossil and renewable energy sources, such as a gas or oil condensing boiler with an electric heat pump. This provides greater flexibility, as innovative Viessmann control systems ensure the most efficient and economical operating mode is always selected automatically. An alternative to the eco mode is the eco mode, in which the system operates with a focus on minimizing CO2 emissions . If the relevant requirements are met, a photovoltaic system can be integrated, meaning the energy required to operate the heating system can be generated immediately. An additional benefit: gas hybrid heating systems are subsidized by the [German] state [subject to local conditions].
A hybrid system is a smart solution if…
Are you already heating with oil or gas?
You want to rely on sustainable heat production from a second heating system
You always want to automatically use the cheapest or most environmentally friendly heating supply
Do you want to become more independent from your electricity supplier with a photovoltaic system?
You want to reduce your purchase costs through subsidies (gas hybrid)
An oil-fired condensing boiler operates efficiently and reliably. Modern boilers can achieve energy savings of up to 35%.
Read more →Two fuel sources in one device - a flexible and future-proof solution.
Read more →Highly efficient oil condensation technology combined with the use of free green energy.
Read more →A wood-fired heating system for an apartment building or a detached house is suitable as either the sole or supplemental heat source in a hybrid system. Climate-neutral operation is one of its most significant advantages. This is because combustion only releases as much CO2 as the wood fuel absorbed during its growth. Relatively stable fuel prices and the possibility of regional procurement also make this heating system an attractive option. However, it should be noted that the heating system itself, fuel storage, buffer tank, and automatic charging conveyor system require significant space and are associated with higher costs. However, these higher costs can be mitigated through government subsidies.
Heating with wood is a smart solution when…
You want climate-neutral heating using wood as a regenerative raw material
You want to benefit from relatively constant heating fuel prices
Do you have space to store pellets or logs?
You have enough space for a buffer tank with a capacity of up to 1000 liters
You want to reduce the higher costs of a regenerative heat generator with government subsidies
A heat pump uses energy stored in the air, ground, or water for heating. It’s efficient and climate-friendly. And since heat sources can be accessed in a variety of ways, this type of heating is suitable for virtually any type of building. If using a ground-source heat pump is out of the question due to geographic location or space constraints, an air-source heat pump is a viable alternative. A very interesting point: Viessmann heating systems can also be used for cooling in the summer. However, it’s important to note that, for technical reasons, heat pumps primarily operate effectively in conjunction with space heating systems. This should be taken into account, especially when upgrading existing heating systems. Your plans should also include sufficient space for the buffer tank required to store the heat. Subsidies can help reduce higher heating and installation costs.
Heating with a heat pump is a smart solution if…
You want to use freely available environmental energy for heating
You have a site with the potential to install geothermal collectors, probes, or mounting pads for an air-source heat pump
You also want to use heating for cooling in the summer.
You have heated floors or large heating surfaces
You have enough space in your home to install a buffer tank with a capacity of up to 1000 liters
You want to reduce the higher costs of a regenerative heat generator with government subsidies
Want to learn more about wood heating? We've compiled comprehensive information on the types, benefits, and purchasing options.
Read more →A pellet heating system is a great alternative to oil or gas heating. Learn interesting facts about this unique heating system in the following sections.
Read more →Whether it's air, brine, or water, a heat pump extracts heat from the environment and uses it for heating and hot water production. Read more about how a heat pump works here.
Read more →Fuel cell technology can produce both heat and electricity. This facilitates a high degree of self-sufficiency, as electricity can be used by residents or fed into the public grid. Overall, energy savings can reach 40 percent. Since the hydrogen required to operate the Viessmann heating system is produced from gas, a proper connection is essential. It is also crucial that electricity and heat are produced in parallel. To generate sufficient electricity, the heat demand must be correspondingly high. Therefore, it makes sense to have a buffer tank to store excess heat. With a buffer tank, the heating system is also suitable for single-family homes with manageable heat requirements. This innovative technology is eligible for subsidies.
Generating heat and electricity is a smart decision if…
You heat with gas or have a gas connection
Do you want to generate heat and electricity with a modern heating system?
You want to gain greater independence from your electricity supplier
You want to offset the relatively high acquisition costs with a state subsidy of up to 11,200 euros
Fuel cells are considered a particularly modern heating technology. But how can you benefit from them? Read more about their features and savings here.
Read more →Viessmann solar collectors can convert solar energy into useful heat for hot water or backup central heating. Learn how it works here.
Read more →Solar thermal energy uses readily available solar energy as a heat source. In Central Europe, solar thermal systems are suitable for domestic hot water or as backup heating. It is impossible to cover the entire heating supply here. However, the savings potential is impressive: annual savings of 60 percent for domestic hot water heating and approximately 35 percent for combined backup central heating. Reducing the use of fossil fuels in heating systems reduces both energy costs and CO2 emissions . However, for the investment to be worthwhile, the roof must be unshaded and facing south, west, or east. Again, this technology is subsidized by the state (subject to local conditions).
Solar thermal energy is a smart solution if…
Do you want to use solar energy to heat water or as a backup source for your heating system?
You own a home with an unshaded roof surface facing south, west or east
You want to supplement your existing heating system with renewable energy sources
Do you want to take advantage of government subsidies for sustainable heat generators?
A photovoltaic system converts solar energy into electricity. This energy can be fed into the public grid for a fee or used by the owner—for example, to power an electric heating system, such as a heat pump. Due to declining feed-in fees and rising electricity prices, the latter option is currently much more attractive. To make the investment in such a system worthwhile, your roof should face south, west, or east. Also, ensure it isn’t shaded by trees, mountains, etc. Government subsidies for photovoltaics and storage can help reduce the purchase cost.
Photovoltaics are a smart solution if…
Do you have a house with an unshaded roof facing south, west or east?
Do you want to gain greater independence from your electricity supplier by using energy from your roof?
You want to generate your own electricity to run your heating system
You want to export electricity to the public grid
You want to reduce investments through subsidies for photovoltaic installations and energy storage systems
Viessmann solar modules enable sustainable generation of electricity using solar energy.
Read more →Harnessing self-generated energy is the premise of an energy storage system. Find out how it works and what solutions Viessmann can offer you.
Read more →In addition to heating, mechanical ventilation also impacts the indoor environment. It helps remove moisture, thereby preventing mold growth and potential damage to the building’s fabric. Heat recovery systems can also relieve the heating system. This is because the heat accumulated in the exhaust air isn’t simply released outside. Built-in filters trap fine dust and pollen. The latter provides relief, especially for allergy sufferers. A distinction can be made between centralized and decentralized ventilation systems. While centralized systems are more suitable for new buildings due to the complexity of installation, decentralized systems are also a good solution for existing buildings and for ventilating individual rooms.
Mechanical ventilation is a smart solution when…
You want to recover valuable thermal energy from exhaust air through heat recovery
You want to maintain a good and healthy indoor atmosphere at all times.
You want to prevent mold from growing.
As an allergy sufferer, you want to filter particles from the air.
You want to eliminate fine dust and noise
You want to avoid drafts
Electric hot water systems heat drinking water only when it’s actually needed. This is particularly hygienic, as water doesn’t sit in the pipes for long periods. Furthermore, hot water can be supplied independently of the central heating system. However, the relatively high cost of electricity makes these systems primarily suitable for rarely used rooms, such as guest bathrooms. Electric space heating systems are particularly suitable for newly built low-rise and passive houses, where the energy requirement for heating is particularly low, as are energy costs. The advantage: rapid heating of tiled floors in the bathroom and kitchen. Viessmann electronic instantaneous water heaters and electric space heating systems, when combined with heat pumps, provide a sustainable increase in system efficiency.
Electronic hot water systems are a smart solution when…
Hot water is needed only occasionally in some rooms
You want to heat water independently of the central heating
Do you want to heat a newly built home with passive or low energy consumption?
You attach great importance to the rapid heating of rooms
A controlled mechanical ventilation system ensures a comfortable indoor climate and may even be required by law. Learn more here!
Read more →Ventilation systems are now standard in new detached homes, especially low-energy and passive house designs. Find out what central ventilation solutions Viessmann offers here.
Read more →Decentralized mechanical ventilation helps prevent mold growth in existing buildings. Read on to learn what to consider when designing.
Read more →An electric heater can be easily installed virtually anywhere as a complement to your heating system. Read more about Vitoplanar products.
Read more →A new heating system can be costly. However, retrofitting an existing heating system saves on heating costs, especially in the long run, and therefore usually pays for itself after just a few years. You’re also doing something good for the environment. You can find out how big your potential savings can be with our free building energy efficiency check.
Viessmann Building Energy Economy Check allows you to quickly, easily, and reliably determine individual modernization options and savings potential. It’s the only program of its kind whose calculations are certified by TÜÜV Rhineland, ensuring you receive objective results.
Conduct a Quick Check now and your local Viessmann sales partner will be happy to advise you.
Viessmann Warme offers you an alternative to traditional heating system purchases. The rental option means you don’t own your new heating system, but you benefit from an all-inclusive support package. Viessmann will handle the installation, maintenance, and smooth operation of your gas hybrid heating system, heat pump, or gas condensing boiler combined with a solar thermal system. You pay a monthly fee and have peace of mind. To tailor the contract to your individual needs, you can choose from three different tariffs.
Radiators are the central component of a heating system. They transfer the generated heat into the living space via a coolant—water. However, while the operating principle is always the same, there are several different types.
This is an essential component of a fuel oil heating system. Learn more about types, sizes, cleaning, and disposal—learn more about fuel oil tanks and models from Viessmann.
Reliable protection for water pipes and appliances from limescale deposits. Learn more about water softening systems now.
Viessmann underfloor heating: an overview of features and types, and a product range overview. Find information here!
Freshwater modules provide hygienic hot water heating. We clearly explain how they work.
In addition to the right heating system and accessories, Viessmann also offers heating control apps. This allows you to easily set the desired temperature while on the go and then return to a warm home. Ease of use is a top priority for Viessmann. The ViCare and Vitotrol apps allow system owners to conveniently manage their heating online. Vitofloor is the ideal solution for underfloor heating. If you’d like to learn more about Viessmann products or download helpful PDFs, the Vitoinfo app is the perfect choice. The Viessmann Vitotronic control unit ensures the perfect interaction of all system components, ensuring reliable and economical operation.
No matter which heating system you ultimately choose, you’ll always have a reliable partner in Viessmann. For over 100 years, the Viessmann brand has stood for quality! “Made in Germany” as one of the leading international heating system manufacturers. Most importantly, our specialized companies offer you first-class service and a comprehensive selection for all fuel types and common heating systems.
Save up to 40% on energy costs
Receive money from the state (subsidies)
Control your modern heating system online
Rely on your heating system for the long term
Become more independent from rising electricity prices (e.g. with photovoltaics)
Reducing CO₂ emissions by 50% to protect the climate and the environment
Get a ten-year warranty on stainless steel condensing boiler heat exchangers
After purchasing a Viessmann heating system, it’s essential to ensure proper maintenance, care, and correct system settings. Regular service by a specialist ensures long-term, trouble-free operation of your heating system. The frequency and scope of service vary depending on the system and model. In addition to information on heating system maintenance , the Viessmann manual offers a wide range of information and tips on heating and energy savings:
With the right measures and our professional advice, you can easily save energy and reduce your heating costs.
We’ll explain how you can quickly and easily remove air from your heating system in just a few simple steps – and thereby reduce your heating bills.
Hydronic heating system balancing can improve the energy efficiency of your heating system by 15 percent, saving you money on energy costs and improving your comfort levels.
Night reset allows you to set the room temperature for periods when you need less heat. We’ll explain how it works and when to use it.
Properly adjust the heating curve to match heating output to actual demand. Read here to learn how it works and why it’s worth doing.
Heat load is calculated to determine how much energy the heating system must use to maintain a comfortable temperature in the home.
Get an overview of the most common fault codes for our Vitodens 200-W and 300-W gas condensing boilers with Vitotronic control unit.
We’ll tell you what to consider during the heating season and when to turn on your Viessmann heating system.
Direct access to experts on all aspects of heating, as well as comprehensive information on the technical data of the Viessmann product range – take advantage of the following offers:
Geothermal collectors for brine/water source heat pumps extract heat close to the surface and can be installed without a permit. You can read more about the differences here.
Looking to upgrade your gas heating system and continue heating with gas? Our condensing boilers burn safely and efficiently. Learn more here.
The heat pump provides heating in an environmentally responsible and efficient manner. Learn more about the types, incentives, and subsidies available, as well as the Viessmann product range, here.