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Targeted ventilation for homes
Think different – think targeted ventilation
RAV System
Introducing RAV System, a groundbreaking solution that brings individual, demand-driven ventilation to residential spaces. This innovative system delivers personalized control for every room in your home. The RAV-Control integration into central ventilation systems and smart home setups, boosting indoor air quality and reducing energy consumption - all while offering effortless implementation.
Unlike before, the RAV system no longer differentiates between supply air and extract air rooms. While a central room is providing the supply air to all rooms in the living space, which are here definied as extract air rooms. This is a completely new approach that promises a lot. Take a closer look.
Targeted Ventilation
This system enables precise indoor air quality (IAQ) control for each room, allowing targeted ventilation with adjustable air volumes tailored to individual needs.
Energy efficient
It minimizes air exchange across the building to only what is necessary or desired, ensuring greater efficiency and energy savings.
Operation
It ensures less drafts in the rooms, eliminates air noise, and is more hygienic by preventing the overflow of already used air from room to room.
High air volume
The system offers a high air volume limit range of up to 60 m³/h per valve, ensuring optimal air volume in all rooms.
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Efficiency and health combined
Individual room control is vital for energy-efficient buildings and why we now extend this concept to ventilation, room-by-room regulation. RAV control achieves energy savings at the same time as it markedly improving indoor air quality.
The new EU directive on energy performance (Article 5, Paragraph 1), effective from April 24, 2024, highlights individualized room control for future energy-efficient renovations and new builds, with national adoption over the next two years.
Indoor air quality is a healthy necessity, as crucial as clean drinking water according to WHO guidelines. Key parameters include:
CO₂: Below 800 ppm
VOCs: Under 1 mg/m³
Relative Humidity: 40–60%
Optimal IAQ in every room
Tailored ventilation
Room usage demands tailored ventilation. In partnership with eQ-3 (developers of Homematic IP), Systemair introduces "RAV-Control" – a ready-to-use system with integrated sensors for automatic airflow adjustment.
RAV distributor
The system’s heart, the RAV distributor, connects ducts that also serve as flow controllers. Sensors for temperature, humidity, and optional CO₂ and VOC levels monitor each room centrally. When pollution increases, the RAV controller boosts fresh air and adjusts valve flaps to restore optimal conditions.
Volume flow sensors
Volume flow sensors also ensure the minimum air exchange balancing supply and extract – even in unoccupied rooms – thus enhancing air quality while reducing energy consumption compared to traditional systems.
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The smart path to energy efficiency
When calculating energy consumption for a ventilation system’s eco-design label, control technology plays a crucial role. The overall energy performance – balancing electrical power consumption and energy savings (for instance, via heat recovery) – is adjusted by specific control factors:
Factor 1:
For ventilation systems with fixed speed levels without control technology.
Factor 0.85:
For systems with central control, such as a humidity sensor integrated into the device.
Factor 0.6:
For systems with demand-controlled individual room control, like "RAV-Control".
The lower the factor the better energy class is received.
In a standard central ventilation system, the air supply volume is set according to the needs of the room with the worst air quality. For instance, if high humidity in bathroom requires increased ventilation, all supply air rooms receive a boosted airflow – even if they do not need it. This overcompensation leads to unnecessary energy consumption by the ventilation unit and increases heat losses, as the efficiency of heat recovery is limited.
In contrast, the demand-controlled "RAV-Control" only supplies as much fresh air to the central air supply room as it is extracted from rooms like the bathroom. Once the sensors in the RAV distributor confirm that the desired room air quality has been achieved, the air supply volume is automatically reduced. This precise, room-specific adjustment minimizes energy waste while ensuring optimal indoor air quality.
RAV system setup
In this system, a central area – typically the hallway – serves as the only supply air room, while all living rooms function as extract air rooms. Integrated eQ-3 sensors in the RAV distributor continuously assess the air quality in each room. The ventilation flaps are then automatically adjusted to limit the airflow, ensuring that each room receives only the fresh air it needs.
This approach maximizes energy efficiency and enhances hygiene by directly extracting contaminated air, rather than routing it through multiple rooms. Additionally, the dynamic, sensor-driven control simplifies design and commissioning. There's no need for manual volume flow regulation or specialized duct sizing; duct connection in the distributor box is designed for the maximum air volume for each valve, allowing for higher airflow with the same system dimensions.
The system offers a high air volume range of up to 60 m³/h per valve, ensuring optimal air volume in all rooms
To make this work, each room has a predefined air volume range, ensuring basic indoor air quality and allowing up to approx. 60 m³/h per valve. Flaps with sensors in each room’s extract air duct regulates air exchange based on current needs.
For instance, increased humidity in a bathroom triggers the flap to open, enhancing air exchange until humidity stabilizes and drops to a predefined value. Similarly, higher CO2 levels in a living room that is used by a group of persons initiates the flap to adjust airflow, extracting used air until the CO2 level normalizes.
The air exchange in the entire living space is no longer depending on the requirements of one room. Air quality in each room is individually monitored and regulated, avoiding unnecessary ventilation and saving energy. The extract air volumes of the rooms are permanently measured, so that the same amount of supply air can always be provided.
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SAVE Air Handling Unit
SAVE units come in a wide range of sizes, dimensions, and colors to blend in perfectly with the look and feel of any home.
RAV Distributor
At the core of our individual room control system lies the RAV distributor, which seamlessly connects the extract air ducts. Each room’s extract air is individually channeled through a ventilation flap equipped with integrated sensors from eQ-3. These sensors continuously measure the room’s air quality and dynamically regulate the volume flow to ensure that each space receives precisely the fresh air it needs. This intelligent control not only optimizes energy consumption but also guarantees a consistently high level of indoor air quality.
RAV Flow Controller
The RAV Flow Controller is an integral part of the RAV Distributor, ensuring efficient and demand-controlled ventilation. By utilizing advanced dampers, the airflow is automatically adjusted for each room connection, optimizing indoor air quality.
The Flow Controller is available in two variants:
A model equipped with both CO₂ and RH sensors for comprehensive climate control.
A model with only an RH sensor for focused humidity regulation.
Through continuous monitoring and automatic adjustment of the ventilation dampers, each room receives precisely the amount of fresh air needed to maintain CO₂ and/or RH levels within the desired range. This ensures a healthier indoor climate, improved energy efficiency, and enhanced comfort.
RAV Controller
Using the RAV controller, individual room control for apartment ventilation can be seamlessly integrated into the Homematic IP smart home ecosystem, allowing for unified management of ventilation alongside other smart devices. This integration ensures optimized, demand-based control that enhances both energy efficiency and indoor comfort.
Airflow Sensor
The airflow sensors, installed in both the supply and extract main ducts, continuously monitor the air entering and leaving the building. By ensuring a precise balance between incoming and outgoing air, they help maintain optimal indoor air quality and system efficiency. If any imbalance is detected, the system automatically adjusts the airflow to restore equilibrium.
Why to choose Systemair as your partner for residential ventilation
More than 50 year experience in ventilation
Eurovent and Passive House certified products
Preparation of ventilation concepts according to DIN 1946-6
Tailored consulting and CAD planning
Complete solution from one single source
Commissioning and technical support
Comprehensive (technical) documentation
Software that makes daily work easier
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Always by your side
Our engineers, technicians, and customer service professionals are united with one shared purpose: To help everyone enjoy fresh, clean, regulated air – for optimal indoor health and comfort. But not at the expense of the environment.