Concepts 2026
In the current year, modernization, energy efficiency and technical retrofitting of many buildings at the same time, in focus. In stock objects, a closer look it's worth it, therefore, is whether the existing window drives are actually fit for the intended RWA and ventilation function and how both tasks can clean match.
Two different tasks with clear technical requirements
In many buildings, window drives, both in the context of the smoke - and Heat vent as well as for daily ventilation to the language. At first glance, this seems obvious, because in both cases, Windows, skylights, or other opening elements of the engine to be moved. Technically, it is not the same task. RWA-systems are used to support emergency escape and rescue routes and controlled Smoke extraction in case of fire. The daily ventilation, however, supports the regular operation of buildings, improve the indoor air and can contribute to energy efficiency.
For planners, window manufacturers, metal construction companies, Electrical contractors, and technical Managers, this distinction is essential. The requirements for speed, safety, cycle stability, control and Monitoring are significantly different. In practice, therefore, is not decisive whether a drive can, in principle, open a window, but whether or not the entire solution to a specific function in your project fits. It is precisely here that the clean, technical coordination begins.
Different protection goals: safety in case of fire versus the exchange of air in everyday life
RWA and daily ventilation pursue different higher-level goals. This difference is the basis of any technical system selection righteous.
RWA is used, the smoke dissipation in critical situations
In the case of a RWA application of comfort in the foreground, but the controlled function is not available in case of an emergency. Smoking must be removed from the defined areas, in order to escape and rescue stay as long as possible, usable, and forces to find better conditions. According to the RWA-function is a part of the overall safety concept of a building.
In practical terms, this means that The interpretation is not based on what is in everyday life, pleasant or sense, but what in the event of fire, reliable operation. Opening elements, drives, power supply, cable management and control therefore be matched to a specific project on the safety function. Significantly, the General desire is not ideas, but the requirements of planning use, structural Situation and fire protection, technical assessment.
Daily ventilation supports indoor climate and quality of Use
The daily ventilation will perform a different task. This is the regular exchange of air to heat dissipation, night cooling, or the improving the air in the room hygiene. Depending on the building, an automated window opening can contribute to a space equal to aerate light and natural ventilation concepts technically clean to implement.
In a professional environment, the convenience does not play a role in this. Also, operating costs, energy use and use of continuity are relevant. A daily ventilation solution must, therefore, recurrent Opening and closing to be designed. She's not working once for a single alarm, but typically the rooms go on for a long time with a regular load.
Why the same opening movement does not mean the same technical problem
In both cases, a window by a motor driven, should not obscure the fact that completely different load profiles are available. In the RWA case, the safe function in case of an Event counts. The daily ventilation of the permanent mechanical strength in everyday life. Exactly this leads to different requirements to drive, control, and overall system.
Technical requirements of RWA-systems in the context of the Project
RWA-solutions need to work in safety-critical situations reliably. Therefore, they are not defined solely on the length of the stroke pressure or force, but through the Interaction of all components.
Quick Opening in the Event of an incident
In case of fire, the speed of response is a key factor. Opening elements must start within the project-specific parameters provided, so that the smoke layers can be dissipated. It is not enough that a drive is applied, in principle, force. What is decisive is whether opening angle, stroke, load, window geometry, and system behavior.
Just for stairways, light domes or openings in the Façade shown that the pure product consideration falls short. The technical effectiveness arises only from the correct combination of drive, hardware, sash weight, mounting and controller. Therefore, the project-based assessment in a professional environment is essential.
Power supply and emergency function
Another key difference to pure ventilation, the question of energy availability. Safety-related systems must also work defines, if the building is in a failure of the regular power supply is present. According to the hedged with SHEV systems play an important role.
In many applications, 24V technique comes with appropriate buffering is used. This architecture is in the security environment, technical sense, because energy supply, Monitoring, and triggering targeted to the requirements of the system to the vote. So the question is not only which drive moves the wings, but also the conditions under which the function in case of an emergency is covered.
Monitoring and system status
Security systems require a higher degree of control over their operating condition. To do this, depending on the design of features such as line monitoring, fault detection, or the examination of a defined system conditions. These requirements differ RWA solutions of simple ventilation scenarios.
For specialists, this means: the quality of The RWA solution shows only one of the mechanical movement, but also on the ability of the system to disturbances detected in good time and the safety technical requirements to control implement. This is a key reason why a simple fan drive is not automatically suitable for fire protection tasks.
Requirements for daily ventilation in the professional building operation
The daily ventilation provides other technical requirements. Here it comes to repeatability, durability and meaningful automation in the normal operation mode.
Regular opening cycles as duration of exposure
While the RWA-function is designed on the case of an Event, working cycles, the daily ventilation, often with recurrence. The window will open in the morning, during the day moves-dependent, and in the evening, then closed again. In addition, automatic reactions on temperature, air quality, or time programs.
Thus, the mechanical stress changed significantly. Gear, chain guide, spindle, bearing, and motor control must be designed so that it can cope with a high number of movements permanently. Cycles is therefore a key quality characteristic for ventilation applications. A System that has only been optimized for the unique safety feature, is not predestined automatically for this type of permanent strain.
Room air hygiene and energy efficiency as a goal of
In everyday life, natural ventilation is often used to improve the air quality in rooms and relieve the burden on technical cooling. Especially in offices, halls or function of buildings in which an automated window opening can contribute to the thermal loads that are to be to organize exchange of air on demand.
From a planning point of view, it is essential that the ventilation function is not considered in isolation. It is part of an operation, and use of the concept. Opening hours, timing, sensors, and integration into the building automation system should be agreed at an early stage. The better the vote succeeds, the cleaner the daily load on drives and window geometries distribute.
Sensors and automation
Typical ventilation solutions work with additional sensors, such as temperature, CO₂, Wind or rain. These signals control the everyday use and ensure that opening elements can not only be operated manually, but systematically.
Here is the difference to the RWA applications is particularly clear. The ventilation of the operating strategy is the focus: when to open, how far is opened, the conditions under which it is closed. This logic is not driven security, but use and building. It requires a different control philosophy as a pure alarm function.
Cycles, strength, speed, and mechanical design
In practice, it is often underestimated how strongly the profiles differ from RWA and ventilation mechanically.
A faster drive is not automatically the right ventilation solution
A drive can show in a safety case, a convincing response performance and, nevertheless, for long-lasting daily operation only to a limited extent be suitable. The reason lies in the interior design. Who looks exclusively on speed or force, hides wear and tear, walking behavior, and duration of stress.
For daily ventilation only Nominal data are therefore not relevant, but also the question of how a drive under regular load is. Running, component wear, thermal stress, and leadership qualities are in a professional environment, not a minor matter, but rather a selection criterion.
Cycle stability as a quality characteristic
A look at typical technical data makes it clear that many drives are designed for repetitive movements. Several Vent Systems drives are rated for a service life of 10,000 double strokes, such as the chain drive VS-KA 300, the VS-KA 400, the VS-DKA 800, the rack-and-pinion drive VS-ZA 800, and the linear actuator VS-LA【31:37†Beschreibung Kettenantrieb – VS-KA 300.pdf†L1-L24】【31:38†Beschreibung Kettenantrieb – VS-KA 400.pdf†L1-L24】【31:39†Beschreibung Kettenantrieb – VS-DKA 800.pdf†L1-L24】【31:40†Beschreibung Zahnstangenantrieb – VS-ZA 800.pdf†L1-L22】【31:41†Beschreibung Linearantrieb – VS-LA.pdf†L1-L31】. For project practice, however, this does not automatically mean that every model should be used identically in every mixed application. The decisive factor remains the specific system design.
Mechanical differences, depending on the installation situation
Chain drives, gear rack drives and linear actuators with different Strengths. Compact chain drives are used in many applications to be useful where discreet Integration and defined strokes are required. Rack - and-pinion and linear actuators can be more demanding loads or special opening elements of the technically more appropriate. The selection is not only a family, but to the wing size, mounting position, Force and the desired operating profile.
Especially with larger wings or special geometries is important to evaluate whether a synchronized solution is required. Here, too, shows The correct drive selection is always part of the total system and not only a question of the catalog value.
Controls for RWA and ventilation: why the Central is crucial
Not only the drive, the controller must match the task. This is especially true if both of these functions come together in a building.
RWA-controls prioritize safety
Central RWA applications must be matched to the security-relevant operation. This trip functions, Monitoring, energy buffering and a clearly defined behavior in the Fault or alarm in the case typically. In mixed operation is important that the safety function always has priority.
This prioritization is not optional comfort settings, but technically mandatory. As soon as a security-relevant scenario, must not obstruct the ventilation logic, the smoke extraction function. The control architecture must reflect this priority clearly.
Ventilation control of the operating logic of the building follow
The daily ventilation of the focus is on ease of use, timing and sensor integration. Here are other requirements come to the fore: How groups are formed? What are the Opening used to be stairs? What are the Sensors, a grab? How to deal with weather data?
A pure ventilation control is therefore not a replacement for a RWA-Zentrale. Conversely, a safety-oriented control panel does not automatically makes all the comfort and operating functions of a complex ventilation strategy. In projects with a dual use, a clean function logic is, therefore, indispensable.
Power supplies and power supply in the ventilation environment
For pure ventilation applications, separate supply solutions can also make sense depending on the design. The VS-LS power supply unit from Vent Systems converts 230 V AC into 24 V DC and is designed to supply electric drives for opening and closing windows and skylights【31:42†Beschreibung Netzteil – VS-LS.pdf†L1-L14】. Such components can be functional in the appropriate application context, but do not replace comprehensive safety planning for RWA requirements.
Combination solutions: when a System is designed to cover both tasks
In many projects, the desire to create a daily ventilation and smoke and heat with matched components. This can be technically useful, but requires a particularly clean planning.
Double action only with a clear prioritization
If a beam element is to be used in everyday life for ventilation as well as in the event of a fire for the smoke dissipation, the safety function is always a priority. This applies to both the control as well as the selection of the drives, the routing and the entire business logic.
The Central question is not whether both functions can, in principle, combine, but what are the project specific conditions is technically and operationally useful. General answers are mostly useless. Crucial to the reliable coordination of all components.
Longevity depends on the correct vote
Dual use, can only convince permanently, if the exposure profile, and system design are fit for each other. A System is used in everyday life intensely, account must be taken of these terms already in the selection. Otherwise, a mismatch between the security requirements and the continuous mechanical stress threatens.
That is exactly why specialists should clarify whether a clean combination is possible or whether separate solutions project was more specific to the more robust version. The right decision is not to simplify, but from a technical clarity.
Typical areas of application and practical project requirements
The differences between RWA and daily ventilation will be needed, if you look at typical locations.
Staircase houses and meeting places
Stairways are one of the classic areas in which the safety-related consideration is in the foreground. Here it comes to smoke dissipation, protection of escape routes and the defined function in the case of an Event. According to the technical design has a strong focus on safety.
Also in the meeting places and other functional buildings with high requirements shows that the RWA must not be used as a secondary aspect to be treated. The selection of beam elements, buttons, Key, and power supply must be matched to a specific project.
Office, halls, and buildings need Ventilation
In other buildings of the controlled exchange of air in the daily life in the foreground. Office space, production environments, or halls benefit from automated window ventilation, when thermal load, air quality, or night cooling play a role.
Drives can be moved much more often. Accordingly, the cycle stability into focus. At the same time can be in such buildings, a combination with safety-related requirements make sense, if the logic of the system separate clean and is prioritized.
Light domes, facade, window and roof window
Depending on the installation situation, loads, strokes, and requirements for the transmission of power is changing. Rack - and-pinion or linear actuators can be in the light, domes and demanding wings technically feasible, while compact chain convince drives in many of the facades and the roof window applications.
From the Vent-system-product overview, it is clear that different types for different application profiles, such as chain drives, gear rack drives and linear actuators for open-close window shutters and light, domes【31:37†description chain drive – VS-KA 300.pdf†L1-L16】【31:40†description rack-and-pinion drive – VS-ZA 800.pdf†L1-L10】【31:41†description linear actuator – VS-LA.pdf†L1-L12】. The selection should be derived from the installation situation.
What specialists in the selection of particularly should be aware of
In a professional environment, a structured testing pays for itself. Anyone who separates RWA and daily ventilation is clear, mostly hits better decisions in the planning, tendering and execution.
1. Protection goal, first define
At the beginning should always be the question of which function is to meet the opening system in the building. It is primarily a safety-related task, daily ventilation, or a combination? Without this clarification, any product selection remains out of focus.
2. Load profile, rate realistic
A System that is only rarely provided for a safety function that is otherwise designed as a drive that runs several times a day. Those who take this distinction seriously, reduces problems later on in operation.
3. Control and power supply thinking
Drive and Central belong together. Especially in the case of RWA applications, the issue of supply, Monitoring, and prioritizing an integral part of the solution.
4. The installation situation, check the technically
Wing weight, the direction of Opening, seizures, stroke, and type of installation will affect the selection considerably. A purely schematic mapping by product name is not enough in many projects.
5. Interfaces to vote early
If the ventilation, building automation, sensors, and security function, interfaces should be planned early. This avoids conflict at a later date in the control logic and clean operation creates States.
Conclusion: RWA and daily ventilation are related, but not equal to
RWA and daily ventilation use often-like opening elements, technically, they are based on different tasks. RWA is used, the safety in case of fire and requires a system backed by the project specific to the intended function. The daily ventilation to be used for the regular operation of buildings and especially requirements for cycle stability, automation and long-term durability.
For specialist firms, this difference is crucial. Anyone who separates the protection objective, the installation situation, load profile, and control logic clean, provides the basis for long lasting and technically sound solutions. Especially in projects with a double use, it comes down to priorities and coordinated overall planning. It is not the external Similarity of the components determines the Fitness, but the precise technical assignment to the respective task. That is exactly the difference between a functioning and a professionally planned solution is.
FAQs
1. Can be used as a RWA-drive for daily ventilation?
In principle, there may be applications in which the same opening elements for both RWA and for daily ventilation will be used. The decisive factor is not the abstract, but the concrete system design is. If a drive in everyday life is to be regularly moved, it must be taken into account, these cycles of stress, technically. In addition, the control system must ensure that the RWA is the function in the case of an Event at any time a priority. Therefore, a double use, it should be always checked for the specific project and is not possible to generally accepted.
2. Why are SHEV systems in stairwells so important?
Stairwells have in the case of an Event of special importance, because they can serve as escape and rescue routes. Smoking is a significant risk, because of the perspective, orientation, and usability of the Rettungswegs can quickly be affected. RWA systems, smoke a controlled manner and to improve the Situation for refugees persons, as well as the use of force. Therefore, the planning of such systems is not to be understood as a convenience function, but as part of a safety-relevant building concept.
3. What is the difference between ventilation and RWA control technically?
RWA controls are focused on security-related processes. These include, according to the application, triggering, Monitoring, energy security and well-defined reactions in the Alarm or fault condition. Ventilation controls follow other hand, the operating logic of the building, such as through time programs, weather data or sensors for air quality and temperature. If both functions are combined, the safety function is always a priority. This is exactly why the controls are not Readily interchangeable.
4. What is the role of the Cycles in the daily ventilation?
The daily ventilation loaded actuators mechanically much stronger than just a safety function in the Event of an incident. Windows are regularly opened and closed, sometimes several times a day, and often automated. This needs to gear, guide, Motor and overall mechanics are on the rise. Cycles is, therefore, a key criterion in the selection process. You decide whether a solution in the long-term operation remains stable and economically.
5. What happens with the ventilation function in case of power failure?
This depends greatly on the particular system design. Pure ventilation solutions are based on the intended supply and the operational requirements of the building. Safety-relevant RWA solutions are planned in the rule, so that their function can also be used in the event of failure of the regular power supply is secured. In combination systems must be checked especially carefully, as supply, prioritization, and operating behavior in the case of a fault are regulated. A clean planning here avoids misunderstandings later on.
ASR A2.3 – escape routes and emergency exits, escape and rescue plan