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Back to Knowledge Hub02.06.2026
Sustainable building technology is a central component of modern construction concepts. In view of increasing requirements for energy efficiency, climate protection and occupant comfort, technical systems are becoming an increasingly important focus for planners, architects and building owners. Ventilation technology, in particular, plays a crucial role. It influences not only a building’s energy consumption, but also indoor air quality, moisture protection and the long-term preservation of property value.
Modern sustainable ventilation systems enable controlled air exchange, reduce heat losses and create the conditions required for energy-efficient buildings. Solutions with heat recovery, in particular, help significantly reduce energy demand while ensuring a high level of indoor environmental quality.
Sustainable building technology includes all technical systems within a building that are designed to use resources efficiently, reduce energy consumption and minimise environmental impact throughout the entire lifecycle of a property.
Its primary objectives include:
The focus is not on individual technologies, but on the interaction of different building systems within a holistic building concept.
Requirements for building efficiency contigoo
nue to increase in both new construction and energy-efficient renovation projects. Modern building envelopes are becoming increasingly airtight in order to minimise heat losses. As a result, controlled ventilation is gaining significant importance.
Without a well-designed ventilation strategy, a reliable supply of fresh air cannot be ensured over the long term. At the same time, the risk of moisture damage, mould growth and poor indoor air quality increases.
Sustainability is not achieved through individual components, but through integrated planning. Building services engineers must balance a variety of requirements:
Ventilation technology plays a key role because it directly influences several of these factors at the same time.
The goal of sustainable building technology is to permanently reduce a building’s energy consumption while maintaining a high level of usability and comfort. Energy efficiency and indoor air quality are directly connected.
People spend most of their time indoors. Consistently high indoor air quality contributes to comfort, concentration and overall well-being. At the same time, air exchange should be as energy-efficient as possible to avoid unnecessary heat losses.
Modern ventilation systems achieve this balance. They continuously supply buildings with fresh outdoor air and remove stale indoor air in a controlled manner. As a result, indoor air quality remains consistently high without the need for constant window ventilation.
Energy-efficient buildings today feature highly airtight building envelopes. High-performance insulation, modern windows and airtight construction methods significantly reduce heating energy demand.
However, this development also creates new ventilation requirements. While older buildings often allowed natural air exchange through gaps and leaks, this effect is virtually eliminated in modern buildings.
Without a planned ventilation strategy, several issues can arise:
For this reason, a well-designed ventilation concept is now an essential element of sustainable building technology.
Traditional window ventilation remains an important part of occupant behaviour. However, it is only partially suitable for ensuring a continuous and controlled fresh air supply.
The actual air exchange rate depends on numerous factors:
As a result, air exchange rates are often either too low or excessive ventilation causes unnecessary energy losses.
Sustainable ventilation systems, on the other hand, ensure continuous, demand-controlled air exchange. Especially in energy-efficient buildings, they provide the foundation for consistently high indoor air quality while reducing energy consumption.
Controlled residential ventilation has become an established component of sustainable building concepts. It provides continuous air exchange independent of occupant behaviour, creating stable conditions for both energy efficiency and indoor environmental quality.
Fresh outdoor air is supplied to living spaces, while stale air is extracted from kitchens, bathrooms and utility rooms. This reliably removes moisture, odours and CO₂ from the building.
For technical planners, controlled residential ventilation offers the advantage that required air exchange rates can be maintained precisely. At the same time, it provides a predictable basis for moisture protection and long-term preservation of the building structure.
Both centralised and decentralised systems are available for implementing sustainable ventilation concepts.
The most suitable solution depends on the specific requirements of the project. Particularly in renovation projects or buildings with limited installation space, decentralised systems often offer significant advantages.
A key element of sustainable ventilation systems is heat recovery. This process uses the thermal energy contained in the exhaust air to preheat incoming outdoor air.
As a result, the building’s heating demand is significantly reduced while maintaining the required air exchange rate.
Benefits for energy-efficient buildings include:
In combination with modern building envelopes, heat recovery is therefore one of the most important elements of sustainable building technology.
Heat recovery is one of the most effective ways to improve a building’s energy efficiency. The principle is based on preventing the heat contained in exhaust air from being wasted.
Instead, the thermal energy is transferred to the incoming outdoor air through a heat exchanger. The two air streams remain completely separated. Fresh outdoor air enters the building while stale air is discharged outside.
This allows a large proportion of the available thermal energy to remain within the building. Heating demand decreases without compromising the required air exchange.
In modern buildings, ventilation heat losses can account for a significant share of total energy demand. The better the building envelope is insulated, the more important this factor becomes.
By using ventilation systems with heat recovery, these losses can be substantially reduced. Incoming outdoor air is preheated before entering the building, meaning the heating system needs to supply less energy.
Benefits for planners include:
For this reason, heat recovery is often a key element of modern ventilation concepts in both new construction and energy-efficient renovations.
Every kilowatt-hour of heating energy saved helps reduce a building’s CO₂ emissions. Since the building sector accounts for a significant share of overall energy consumption, this aspect is becoming increasingly important.
Ventilation systems with heat recovery make a direct contribution to emissions reduction by lowering the demand for additional heating energy. At the same time, they support the implementation of long-term sustainability strategies in the building sector.
For technical planners, this creates a dual benefit. On the one hand, the building’s energy performance improves. On the other hand, increasing requirements for sustainability, resource conservation and building efficiency can be met more effectively.
Heat recovery therefore becomes a central component of sustainable building technology and an important tool for future-proof building concepts.
Contact
We provide architects and technical planners tailored solutions to address every ventilation challenge with precision. Whether it is sound insulation, energy efficiency, or optimising facade aesthetics, our expert technical teams are equipped to provide you with the ideal solutions.
With Ventomaxx, you gain access to comprehensive hybrid ventilation concepts that seamlessly combine passive and active systems from a single, trusted source. Our mission is to improve indoor air quality in the most efficient way.
We provide architects and technical planners tailored solutions to address every ventilation challenge with precision. Whether it is sound insulation,
energy efficiency, or optimising facade aesthetics, our expert technical teams are equipped to provide you with the ideal solutions.
With Ventomaxx, you gain access to comprehensive hybrid ventilation concepts that seamlessly combine passive and active systems from a single, trusted source. Our mission is to improve indoor air quality in the most efficient way.
