Frequently asked questions

1. Airflow capacity: Choose a ventilation unit with airflow rates that match the size of your home and its ventilation requirements. 
2. Energy efficiency: Select a ventilation unit with a high heat recovery efficiency. 
3. Versatile control options: Make sure the ventilation unit can be controlled in the way that suits you best, such as with a wall-mounted control panel, a kitchen cooker hood, remotely via your mobile device, or integrated into a home automation system. 
4. Automation: Ensure that the unit includes advanced defrosting automation and built-in indoor air quality sensors. 
5. Noise level: Choose a ventilation unit that operates as quietly as possible, especially if it will be installed in the kitchen, bathroom, utility room, or walk-in closet. 
6. Filter availability: Make sure that compatible replacement filters are readily available. Original manufacturer filters are generally the best option. 
7. Serviceability and durability: Consider how easy the unit is to maintain and clean, so that its performance and cleanliness can be preserved over the long term. 

All Vallox ventilation units meet the above requirements and features. 

The different Vallox 125 CFi models have duct outlet configurations that match many older ventilation unit models, or they require only minor ductwork modifications. The letter in the unit name (A-H) indicates the model type, meaning the arrangement and location of the duct outlets.

A standard ventilation unit adjusts the fan speed but cannot compensate for airflow changes caused by factors such as a window being left open temporarily or reduced airflow due to dirty filters.

The abbreviations CFi, MV, MC, and SE that appear after the product name of a Vallox ventilation unit refer to the unit’s control system or operating method.

MyVallox ventilation units always come with built-in humidity and carbon dioxide (CO₂) sensors.

Vallox MyVallox ventilation units can be connected directly to a Modbus network without the need for a separate adapter. Modbus functionality is built into MyVallox ventilation units as a standard feature.

MyVallox MV ventilation units can be connected to a KNX smart home system using a KNX bus converter, which is available as an optional accessory.

A coil connected to the ground-source heat pump collector loop is not available as a built-in option in Vallox ventilation units. However, a MLV duct radiator can be connected to the ventilation system.

The ventilation unit is equipped with a LAN cable, which is connected directly to the router. The ventilation unit does not have a built-in wireless Wi-Fi connection.

MyVallox units, meaning MV and CFi models, can be registered to the browser-based MyVallox Cloud service using an internet connection. Through this service, the units can be controlled over the internet using a computer, tablet, or smartphone. Registration to the service is free of charge.

Partly, yes.

The exhaust airflow of a cooker hood or central vacuum system can be greater than the total ventilation airflow of the entire dwelling, so it may not always be possible to fully compensate for it with a ventilation unit, unless the unit is equipped with the constant airflow feature. With a CFi unit, negative pressure should not occur.

Compensation with MyVallox MV-units requires a contact output (switching contacts) from the cooker hood, central vacuum cleaner or a pressure difference switch connected to them. The control voltage received from the MV unit is brought through these contacts back to the digital input. At the controller of the MyVallox unit, choose Self-programmed input as the setting for this digital input. After that, choose the desired power for the supply and extract fans in the self-programmed input settings.

MyVallox CFi and MV ventilation units can be controlled with the MyVallox Control controller supplied with the unit, which is based on separate modes, such as Home and Automatic mode, selected by the user. The unit can also be controlled with the newer MyVallox Touch controller, either in parallel or on its own. The Touch controller includes Home, Away, Automatic, Boost and Custom modes, and it can be recessed into the cover plate of certain switch systems. CFi and MV models can also be controlled with a cooker hood and can be connected to a building automation system for remote control, for example via a smartphone (KNX, Modbus, voltage signal). The units can also be connected to the free browser-based MyVallox Cloud service. Of these different control options available for the units, the option best suited to the property and lifestyle can be selected.

It is worth replacing your ventilation unit because the heat recovery core in older ventilation units is often significantly smaller than that of today’s energy-efficient devices. In addition, the fans in new units often consume less electricity than those in older units. If you would like to examine the matter more closely, download the Excel file that allows you to estimate energy consumption based on the price of your own electricity contract and your own ventilation settings.

Vallox does not offer app-based control for its ventilation units.

Airflows should always be adjusted with the heat recovery (HRV) function enabled, because the correct supply/exhaust air ratio is particularly important during winter conditions. When a Vallox MyVallox unit is commissioned correctly, heat recovery is active.

The fan, temperature and other settings made during setup are automatically saved as setup settings. Changes made later are automatically saved as user settings. Also changes made later on can be manually saved as setup settings. You can restore both setup and user settings at the controller or via remote control.

Note! When the setup settings are restored, they also overwrite the user settings. Factory settings reset erases both the setup and the user settings from the memory of the unit.

Product-specific operating instructions, maintenance instructions, installation instructions, technical data and dimensions can be found for each MyVallox ventilation unit on the product page.

Also, you can use WebHelp that contains instructions for the setup, use and maintenance of your MyVallox ventilation unit. WebHelp is available online and is easy to use either on a computer or a mobile phone.

The factory settings of Vallox ventilation units have been selected to ensure that the unit operates as energy-efficiently as possible. Do not change any settings unless you know what you are changing and how it will affect the operation of the unit. If you change any setting, make a note of both the original value and the new value so that you can restore it if necessary. The unit operates correctly and economically with the factory settings.

MyVallox CFi and MV ventilation units are equipped with an electric post-heating element inside the unit. It heats the supply air when heat recovery alone is not sufficient to raise the supply air to the desired temperature. The desired temperature can be set by the user from the unit’s control panel.

The supply air temperature can be freely selected according to personal preference. The recommendation is that the temperature should be a couple of degrees lower than the room temperature. The higher the supply air temperature setpoint, the more electricity the post-heating function will consume.

Many Vallox ventilation units include a fireplace function, which is designed to assist with lighting a fireplace. In newer units, the same function can be achieved through a Custom setting. When the flue is still cold, the fireplace function creates temporary positive pressure inside the house. The fireplace function in ventilation units is not intended to provide combustion air for the fireplace.

A new functionality, heating season, was added to the heating settings of the software version 2.0.24.

The addition was made to enable as efficient heat recovery as possible in the heating season and to make it possible to cool the home with outdoor air in spring and winter, without having to change the settings of the unit according to the season. At the same time, the electricity consumption of post-heating can be minimised safely. The outdoor temperature limit for the heating season can be set between 0°C and +19°C.

When the outdoor temperature sinks below the temperature set for the heating season, the heat recovery bypass automatics and partial bypass are not in use, that is, the heat recovery is always working at full capacity. In these circumstances, the supply air temperature may be higher than the temperature set for supply air. If the heat recovery cannot heat the supply air to the set temperature, the ventilation unit uses the post-heating resistor, when necessary. When the supply air temperature is set below 15 degrees Celsius, for instance, heat recovery will heat the supply air to a higher temperature for most parts of the year. Therefore, the post-heating resistor is only on during the coldest time of the year.

Please note that if the humidity of the indoor air is high, a supply air temperature that is too low may cause condensation in the supply air valves.

When the outdoor temperature rises above the outdoor temperature set for the heating season, the ventilation unit aims to heat the supply air to the set temperature by using full or partial heat recovery. The post-heating resistor will not turn on regardless of the supply air temperature setting.

In ventilation models without a partial bypass, heat recovery may heat the supply air to a considerably higher temperature than the supply air temperature setting.

The ventilation unit needs post- and additional heating resistors during defrosting cycles, so they must not be turned off, or stopping the supply fan must be chosen as the defrosting method.

In the ventilation unit, you can adjust the fan speed yourself for the Home and Away modes. You can choose to switch between the Home and Away modes according to your needs, the number of occupants, and the level of activity in the home.

All new MyVallox ventilation units feature SmartDefrost by Vallox®, a demand-based defrosting automation system that defrosts the heat recovery core only when necessary. This ensures a high annual heat recovery efficiency. The automation continuously measures temperatures around the heat recovery core and determines whether ice is beginning to accumulate in the core. When too much ice has formed, the core is defrosted. When core bypass is in operation, the ventilation unit bypasses the supply air side of the heat recovery core during the defrost cycle, and the heat from the extract air defrosts the core. Supply air continues to flow past the core, so the supply/exhaust air balance does not change.

The temperature of the air coming from the ventilation unit should be slightly lower than the room air temperature. This allows the air to circulate in the room and enables the warmer, used air to be removed from the space.

Heat recovery bypass is automatic in MyVallox models. When outdoor air is warmer than the setpoint for supply air temperature, the unit switches bypass on. If outdoor air is warmer than the air going out from the dwelling, the unit uses cool recovery: it aims at cooling down the warm outdoor air with the coolness of extract air. The status of heat recovery and bypass is shown at the controller.

There is no separate summer/winter switch, but if you want to use the cooling function in summer, you have to set it: Special settings – Sensor settings – °C adjustment mode – Cooling. With this setting, ventilation is boosted automatically when supply air can be used to cool the dwelling.

You can try to resolve the issue using the steps below:

Insufficient ventilation can be recognized by stale indoor air, moisture condensing on windows and surfaces, and poor removal of odours, especially in the kitchen or bathroom. These issues may be caused, for example, by incorrectly adjusted airflow rates, malfunctioning of the ventilation unit, or dirty filters in the unit.

The file does not have a password.

The settings of Vallox ventilation units are chosen at the factory to ensure their maximum energy-efficiency. Do not change any settings if you are not absolutely sure of what you are doing and how the change will affect the unit’s operation. If you change a setting, write down the original setting and the value you changed so that you can go back if necessary. The settings made at the factory ensure the correct and economical operation of the unit.

You can freely choose the supply air temperature according to your preferences. The recommended temperature is a couple of degrees below the temperature of the room air. The higher the default supply air setting, the more electricity post-heating consumes. In winter, heat recovery always heats the supply air with heat recovered from the extract air, regardless of the supply air temperature setting. A low supply air temperature can affect the comfort of living, but it has no effect on the operation of the ventilation unit or its defrosting automation. A specific supply air temperature can be set for each mode (At home/Away/Boost/Custom).

An example of setting the supply air temperature for the At home mode:

Using the MyVallox Control control panel (four buttons at the bottom): Set the unit to At home mode. Press (i) info -> pen icon -> use the arrow to go to Supply air temperature setting -> set the supply air temperature by using the – and + buttons. Press OK to confirm the value that you have set.

Using the MyVallox Touch control panel (touch screen): Menu -> Ventilation mode settings -> At home settings -> Supply air temperature setting -> pen icon -> set supply air temperature using the – and + buttons. Press OK to confirm the value that you have set.

Other important ventilation unit settings in winter include the following:

Menu -> Expert settings -> Defrost settings

Defrosting method: Bypass (Fan stop in the 90 and 121 models)

Supply air temperature setting. Supply air temperature during defrosting cycle (not selectable on the MyVallox Touch control panel)

Indoor air: %Rh 0 (not selectable on the MyVallox Touch control panel)

Outdoor air: °C 20. (Not selectable on the MyVallox Touch control panel)

Menu -> Expert settings -> Heating settings:

Post-heating method Electrical resistor (liquid radiator only 245 MV VKL). Must not be turned off, unless the defrosting method is changed to fan stop!

Additional heating method On/electrical resistor. Must not be turned off, unless the defrosting method is changed to fan stop!

Stopping the supply fan creates underpressure in the home during defrosting cycles.

Heating season (Factory setting 12°C) When the outdoor air temperature is higher than the set value, the heat recovery bypass automation is working and post-heating will not be switched on.

HR cell Aluminium (not selectable on the MyVallox Touch control panel)

Menu -> Expert settings -> Control settings:

°C adjustment method: Supply air (Extract air in Aito Kotilämpö)

Humidity: Automatic. The ventilation unit sets the correct humidity percentage according to the history data of the home. The ventilation unit cannot increase the indoor air humidity in the home.

Co2 limit. (Factory setting 800 ppm). The ventilation unit boosts the ventilation if the carbon dioxide level rises above the set value. This requires a carbon dioxide sensor to be connected to the unit.

Menu -> Expert settings -> 1/0 and bus settings -> External sensor settings

External sensor setting: None (THERE MUST NOT BE Air heating in any other units except Aito Kotilämpö!). If a separate duct radiator is connected to the ventilation unit, choose the correct setting. Duct radiator settings can be found under Is it possible to use a cooling or preheating radiator connected to ground heat in MV models?

Settings of the Custom (Fireplace) mode:

Please note! Long-term use of the Fireplace mode may cause a fault in the ventilation unit during freezing weather due to the low temperature of the supply air, which may cause the unit to turn off.

MyVallox Control panel (four buttons at the bottom):

Set the unit to Custom/Fireplace mode -> Press (i) Info -> pen icon.
Timer On
Duration 15 minutes
Supply air fan % Increase the percentage of the supply air fan by the required amount. Please note! A significant difference between the speeds of supply and extract air fans may cause a fault in the ventilation unit during freezing weather due to the low temperature of the supply air, which may cause the unit to turn off.
Extract air fan % At least as large as the fan percentage of the At Home mode
Supply air temperature setting 15°C

MyVallox Touch control panel (touch screen):

Menu -> Ventilation mode settings -> Custom (Fireplace) settings –> pen icon -> You can change the specific settings by moving the cursor on top of the setting and selecting the pen icon.
Timer On
Duration 15 minutes
Supply air fan % Increase the percentage of the supply air fan by the required amount. Please note! A significant difference between the speeds of supply and extract air fans may cause a fault in the ventilation unit during freezing weather due to the low temperature of the supply air, which may cause the unit to turn off.
Extract air fan % At least as large as the fan percentage of the At Home mode
Supply air temperature setting 15°C

Settings of cooker hood compensation:

Please note! Long-term use of the cooker hood compensation may cause a fault in the ventilation unit during freezing weather due to the low temperature of the supply air, which may cause the unit to turn off.

MyVallox Control panel (four buttons at the bottom):

Menu -> Professional settings -> 1/0 and bus settings -> Input settings -> Digital input 1 or 2 (select the one to which the cooker hood compensation is connected) -> Programmable input
Duration 00:01 (The mode is on as long as contact data is transmitted from the cooker hood.)
Supply air fan % Increase the percentage of the supply air fan by the required amount. Please note! A significant difference between the speeds of supply and extract air fans can cause a fault in the ventilation unit during freezing weather.
Extract air fan % At least as large as the fan percentage of the At Home mode
Supply air temperature setting 15°C

MyVallox Touch control panel (touch screen):

Menu -> Professional settings -> 1/0 and bus settings -> Input settings -> Digital input 1 or 2 (select the one to which the cooker hood compensation is connected) -> Pen icon -> Use the arrow to move to Programmable input and select OK. You can change the specific settings by moving the cursor on top of the setting and selecting the pen icon.
Duration 00:01 (The mode is on as long as contact data is transmitted from the cooker hood.)
Supply air fan % Increase the percentage of the supply air fan by the required amount. Please note! A significant difference between the speeds of supply and extract air fans may cause a fault in the ventilation unit during freezing weather due to the low temperature of the supply air, which may cause the unit to turn off.
Extract air fan % At least as large as the fan percentage of the At Home mode
Supply air temperature setting 15°C

Always check, in connection with maintenance or when it is suspected that the unit may not be operating normally, that the potential heat recovery cells are securely mounted. You can find their correct locations in your unit’s manual under Cleaning the heat recovery cell.

The heat recovery cell in old ventilation units is often significantly smaller than in modern, energy-efficient units. In addition, the fans of new devices often need less electricity than those of older models.

Below, you can find an indicative calculation of potential savings at a price of 20c/kWh for electricity. The calculation is based on the conditions in Central Finland. In Southern Finland, the required energy for heating is about 15% lower than the calculation, and in the north, about 20% higher. The location does not affect the energy consumption of the fans.

For more details, download the Excel file to help you assess energy consumption at the price of your electricity contract and your ventilation unit’s settings.

Method 1: Automatic cooker hood boosting with a self-programmed digital input

With the cooker hood boosting function, the fan speed of the ventilation unit increases when the flap of the cooker hood is opened.

Automatic cooker hood boosting can be implemented by bringing a control voltage of 24 V from the timer of the flap of the cooker hood, such as Vallox KTXA, to the digital input (1 or 2). The contacts of the timer of the cooker hood close when the flap is opened. In this case, Self-programmed input has to be chosen as the function for the digital input. In the settings for the Self-programmed input, switch the timer off, set the desired power for the supply and extract air fans as a percentage as well as the desired supply air temperature. These can be different from the setpoints of the other profiles. The supply/extract ratio can also be different from other profiles if you wish to compensate for the increase in the extract air flow caused by the opening of the flap of the cooker hood.

Method 2: Controlling fan speed at the cooker hood:

You can control the fan speed of an MyVallox unit (away/home/boost) with any cooker hood that gives a voltage signal (0-10 VDC).

Note! You cannot increase fan speed at the cooker hood higher than the Boost profile.

The MV unit is controlled in parallel with the MyValloxControl controller supplied with the unit. The latest command is always the one that stays in force.

In both cases, all the functions of the MyVallox unit are also controlled at the MyValloxControl controller.

You can find the nearest partners using our map service.

Consumers cannot purchase spare parts directly from Vallox. Instead, they are advised to contact their nearest authorized service provider.

The filters in a ventilation unit should be replaced at least twice a year. More frequent replacement is recommended if the building is located near a busy road, if there are pets in the household, or if any occupants suffer from allergies.

The unit’s model number can be found on the rating plate, which is located inside the unit.

You can find manuals for discontinued Vallox ventilation units here.

Every six months, when replacing the filters, it is recommended to inspect the inside of the unit, check the condensate drain connection, and remove any dust that may have accumulated inside the unit.

A link to the update package and detailed instructions can be found on the dedicated software update page.

Instructions for restoring the factory settings can be found here: (techmanuals.info)

When the summer cooling function is enabled, the ventilation unit automatically increases the fan speed whenever outdoor air can be used to cool the dwelling.

The Low Supply Air Temperature alarm means that the supply air temperature of the ventilation unit has dropped below 5°C. This alarm is activated when the unit detects excessively cold supply air, which may be caused by severe freezing weather, a mechanical fault (such as a malfunctioning bypass damper, a failed heating element, or dirty filters), or abnormal airflow settings.

A ventilation unit can freeze during winter because cold outdoor air and warm indoor air meet inside the unit. When this happens, moisture can condense and turn into ice on the extract air side of the heat recovery core.

The operation of a ventilation unit naturally produces water (condensate), which should drain from the unit into the sewer system through a condensate drain pipe and water trap, both of which are installed by professionals.

Check the external sensor setting:

When the controller display shows “bussfault”, it usually indicates a Modbus communication problem. This can be caused by several factors, such as:

A short and unexpected power outage does not require any special actions. During a power outage, it is a good idea to ventilate the home from time to time to allow fresh air to enter.

When heat recovery is on, the exhaust air is cooler than the extract air (indoor air). You can check these temperatures on the control panel display or in the MyVallox Cloud service. On cold winter days, the temperature of the exhaust air must be a few degrees higher than the temperature of the outdoor air. During defrosting cycles, the exhaust air temperature rises; this is normal.

The ventilation unit flows outdoor air through the heat recovery cell and heats it up with the extract air. However, in the summer it is best to by-pass the heat recovery cell and bring in outdoor air without heating it. In older models, this can be achieved by adjusting the position of the summer/winter damper, or automatically in newer models. Different units have different settings that determine when the automatic heat by-pass is allowed. NOTE! If a professional has adjusted the settings during the unit deployment, they should be in order.

Ensure that the unit has clean filters so that the unit can take fresh outdoor air.

If the problem is not solved, contact the maintenance shop.

Not necessarily. You can choose in the fireplace profile settings of an MV unit if extract air flow is reduced and/or if supply air flow is increased, and you can also specify the amount of decrease or increase. You can freely choose the time period for the fireplace function. It is also possible to implement the fireplace function with a separate switch (push button).

The fireplace always needs to have a combustion air duct that comes directly from the outside to a location recommended by the fireplace manufacturer.

Operation of the supply air adjustment:

• When the temperature of the air that comes through the heat recovery cell is lower than the set supply air temperature, the setting uses the heat recovery cell and the post-heating radiator to achieve the set temperature.
• The heat recovery cell is bypassed if there is no need to heat the supply air.

Operation of the extract air adjustment:

• If the extract air temperature is lower than the set supply air temperature, the setting increases the target value of the supply air setting (max. 10°C).
• If the extract air temperature is higher than the set supply air temperature, the setting reduces the target value of the supply air setting (max. 10°C).
• When the temperature of the air that comes through the heat recovery cell is lower than the supply air target value, the setting uses the heat recovery cell and the post-heating radiator to achieve the target value.
• The heat recovery cell is bypassed if there is no need to heat the supply air.

Operation of the cooling adjustment:

• If the extract air temperature is lower than the set supply air temperature, the setting increases the target value of the supply air setting (max. 10°C).
• If the extract air temperature is higher than the set supply air temperature, the setting reduces the target value of the supply air setting (max. 10 °C) and boosts the fan speed based on the need up to the fan speed setting of the Boost mode. When the Boost mode is in use, the fan speed is increased based on the need up to the maximum speed.
• When the temperature of the air that comes through the heat recovery cell is lower than the supply air target value, the setting uses the heat recovery cell and the post-heating radiator to achieve the target value.
• The heat recovery cell is bypassed if there is no need to heat the supply air.

The permitted range of the supply air setting is +5…+25 °C. The recommended setting is +15 °C.
The post-heating radiator is only used in the heat recovery mode and during defrosting, and when the winter setting is higher than the outdoor temperature.

To change the temperature adjustment method, do as follows:

• Software version 2.0 or newer: Settings – Expert settings – Control settings – °C adjustment method.
• Older software versions: Settings – Expert settings – Sensor settings – °C adjustment method.

A higher or lower number of occupants than expected may create the feeling that the ventilation is not suitable for your needs. The fan speed in Home, Away, or Boost mode can be adjusted if necessary. Instructions for doing so can be found in your ventilation unit’s settings. Changing the fan speed in these modes does not alter the supply/exhaust air balance of the ventilation system.

The surface area of the net installed over the grille is much smaller than that of the unit’s filter, which means that it will become blocked much quicker than the coarse filter of the ventilation unit. This would lead to extra maintenance needs. One reason why the use of the net is explicitly prohibited is that the grille is difficult to access, for which reason it is not maintained regularly. We have seen places where no outdoor air has been blown into the apartment for years through the unit.

Another reason is that a net installed over the outdoor grille increases the flow resistance even when it is clean. It decreases the air flow and increases the noise level of the ventilation system.

Vallox ventilation units have a two-phased supply air filtering. The fine filter cassette filters the smallest of particles, whilst the coarse filter stops larger dust particles, preventing the fine filter from becoming blocked as quickly. Therefore, it is often advisable to hoover the coarse filters also between filter changes during the “dirtiest” season.

Pureo air handling units are particularly well suited for commercial and institutional buildings, such as offices, schools, retail premises, and small to medium-sized public buildings, where efficient and energy-efficient ventilation is required.

The selection is based on the required airflow rate, the intended use of the space, energy-efficiency targets, and installation and space constraints. A suitable Pureo unit can be sized using the Pureo MySelecta selection software. Pureo air handling units are available in many different sizes, making them suitable for a wide range of spaces and applications.

SFP (Specific Fan Power) describes the electrical power consumption of the fans in relation to the airflow rate. The lower the SFP value, the more energy-efficient the ventilation system is.

They refer to different models in the Vallox Pureo product range.

A Pureo unit can be equipped with its own automation system, or it can be supplied as a terminal block unit, in which case control is carried out through the building automation system.

Ventilation can be controlled based on factors such as CO₂ concentration, humidity, or occupancy, using sensors available as optional accessories.

Vallox Pureo units are available with a very wide range of accessories, including:

A differential pressure transmitter measures the pressure difference within the system and helps automatically regulate the airflow.

In Pureo units, fault diagnostics work by monitoring measurement data from sensors and components through the control system. The control system detects deviations from normal operation and displays alarms directly on the control panel or in the building automation system.

Yes. Technical support and sizing assistance are available for selecting a suitable Vallox solution. Professionals can contact Vallox sales representatives and explore the MySelecta Pureo sizing and selection software. It is a sizing and selection tool that can be used to choose the appropriate Pureo unit and determine operating parameters suitable for the project.

A Pureo unit is connected to a roof exhaust fan by integrating both into the same ventilation duct system and synchronizing their operation through the control system. This ensures that the exhaust airflow operates in balance with the Pureo unit.

Commissioning the unit and balancing the airflow rates is always the responsibility of a professional. After commissioning, the unit does not require any action from the user during the first few months.

Yes, the system can be upgraded later by adding accessories such as indoor air quality sensors. This allows the Pureo ventilation unit to be adapted as the needs of the commercial space change over time.

Software updates for Pureo units are carried out by a qualified professional during commissioning and maintenance procedures.

The air handling unit should be maintained by a qualified professional in accordance with the maintenance plan specified in the user manual.

It is not recommended for users to adjust the settings of Pureo units themselves.

You can find the nearest service provider and filter retailer on the map available on our website: Vallox Map

You can find your Pureo unit’s model number on the rating plate attached to the unit’s casing, usually near the service door or on the inside of the unit.

The most common types of fans are roof fans, duct fans, wall-mounted fans, and axial fans. They differ from one another in terms of design, application, and installation method.

1. Roof Fans

Vallox offers solutions for continuous ventilation, smoke extraction, ATEX-classified hazardous areas, and T120-rated applications, where the fan is designed to withstand a continuous operating temperature of 120°C.

In small ventilation systems, a single fan may be sufficient. However, in larger buildings, multiple fans are often used to ensure even air distribution and operational reliability.

The selection is based on the required airflow rate, pressure loss, noise requirements, and the installation environment. A suitable fan can be selected using the Exxeo Select or Helios Select selection software.

The ability to handle pressure loss depends on the type of fan and its sizing. A correctly selected fan ensures sufficient airflow even in demanding duct systems with higher pressure losses.

The noise level of fans depends on the airflow rate, the type of fan, and the installation location. Noise levels can be influenced through proper sizing and by adding sound attenuators.

These are model designations within the Vallox Exxeo roof fan range.

The Vallox Exxeo DS is a two-speed model designed for renovation applications.

Vallox Exxeo roof fans can be equipped with a variety of accessories, including sensors for measuring outdoor temperature, duct air temperature, humidity, carbon dioxide (CO₂), and VOC compounds, as well as a time switch with enclosure for two-speed roof fan control and a potentiometer for 0-10 V control of the roof fan.

The Vallox Exxeo basic model and the DPC model are equipped with Modbus readiness directly in the fans, with the exception of the two smallest sizes.

Yes, Vallox Exxeo roof fans can be factory-painted in the desired color, allowing the roof fan to blend more seamlessly with the building’s roof.

Vallox Exxeo roof fans are available in the MagiCAD Cloud product database and can be used in AutoCAD and Revit software. In addition, the products are available in the Cadmatic HVAC software.

The roof fan must be installed on the roof in such a way that maintenance procedures can be carried out safely. The unit is always supplied with an installation frame, which makes on-site installation of the roof fan easy.

Vallox Exxeo roof fans can be installed even in demanding climatic conditions. The zinc-magnesium coated steel sheet (corrosion category C4, painted C5) provides protection against corrosion and remains durable in all weather conditions.

Vallox Exxeo roof fans are equipped with a tilting section, which allows the roof fan to be swung aside during maintenance.

You can find the cooker hood compatibility table here.

In smaller apartments, the cooker hood’s extraction function can be connected to the ventilation unit, eliminating the need for a separate extractor hood or dedicated ducting for cooking fumes. The cooker hood can also be connected to a stove fan and house fan unit or a roof exhaust fan, in which case cooking fumes are extracted through a separate route.

A cooker hood is equipped with a grease filter, lighting, and controls that can be used to control the ventilation system through the hood. A cooker extractor fan has its own motor and fan, which actively remove air.

The choice between the two depends on the type of ventilation system installed in the building and what can be connected to it.

Choosing a cooker hood depends on the size and location of the cooktop, the mounting and control method of the hood, the desired features, ease of maintenance, budget, and appearance.

The Vallox Delico range of cooker hoods can be easily integrated into a unified kitchen design. The hood can be incorporated into the kitchen cabinetry using a pull-out model.

There must be a sufficient safety distance between the cooktop and the cooker hood. In most cases, the distance between the cooker hood and the cooking surface below should be at least 500-600 mm above an electric cooktop and 650-750 mm above a gas cooktop.

The first part of the model name indicates the application (where the unit is used).

The extraction airflow of a cooker hood draws air into the hood ductwork when the hood is in operation. The shape and size of the hood affect how effectively cooking fumes, steam, and odors are removed.

Method 1: Automatic cooker hood boost using a programmable digital input

The installation of a cooker hood should always be carried out with the assistance of a professional. Ensure that the cooker hood is suitable in terms of dimensions and that the installation height is correct. Prepare the mounting either directly on the wall or underneath a kitchen cabinet.

Always switch on the cooker hood or cooker extractor fan when cooking. If the hood has adjustable power settings, you can select the extraction level that most effectively removes cooking fumes and steam from the room air.

Cleaning the grease filter helps ensure adequate exhaust airflow and should be carried out regularly, at least 1-2 times per month.

Grease stains resulting from cooking should be cleaned immediately, and the exterior surfaces of the cooker hood should be wiped regularly. A mild detergent solution is suitable for cleaning the exterior surfaces of the cooker hood.

For ventilation ducts, you can choose between various steel duct solutions or plastic-based systems, such as the Vallox BlueSky ventilation system. The choice depends on factors such as the building structure and the available installation space for the ductwork.

The fire safety of the Vallox BlueSky system has been verified by a VTT research report.

The Vallox BlueSky air distribution system is suitable even for confined installation spaces, such as low suspended ceilings. It can be installed easily inside partition walls, intermediate floors, suspended ceilings, enclosures, or concrete structures.

In detached houses, the typical duct diameter is 160-200 mm. In the Vallox BlueSky system, however, air is carried in a large duct only as far as the distribution box. From there, an individual flexible 75 mm duct is routed to each air valve.

Yes, silencers should generally be installed in all ventilation duct systems. In a BlueSky duct system, the silencers are installed between the ventilation unit and the distribution boxes.

The sound insulation of ventilation ductwork should be inspected regularly for possible damage, wear, and loose seals. Seals and insulation materials used for sound insulation may deteriorate or become damaged over time, reducing their effectiveness. Condensation water can also damage insulation materials if the drainage system is not functioning properly.

The Vallox BlueSky ventilation duct system is particularly well suited for renovation projects. Thanks to its design features, the ductwork can be installed even in confined spaces, and the ducts are flexible, making them quick to position and easy to measure in renovation applications.

The Vallox BlueSky ventilation duct system is easy to modify after installation, as the ducting is flexible and can be easily disconnected from the distribution box.

Vallox offers a calculator for estimating the material requirements of a Vallox BlueSky ventilation system, allowing you to quickly and easily determine the quantity of system components needed for your project.

The Vallox BlueSky ventilation duct does not require insulation when installed in a heated space.

There is no legal requirement mandating a specific duct cleaning interval for detached houses, but the general recommendation is to clean the ventilation ducts approximately every ten years.

A duct radiator is used in Vallox ventilation units when there is a need to provide additional heating or cooling of the supply air before it reaches the occupied spaces. The specific application depends on where the radiator is installed.

A radiator connected to the collector circuit of a ground-source heat pump is not available as a built-in option in Vallox ventilation units, but an MLV radiator installed in the ductwork can be connected to them. Control of the pump and solenoid valve for the cooling and preheating circuit can be provided by the MyVallox unit’s automation system.

When an MV ventilation unit is used to control a duct radiator valve and actuator, it is recommended that the unit is running software version 2.0 or later. Control of a radiator installed in the supply air duct cannot be implemented with older software versions. If the unit is registered to the MyVallox Cloud service, it will always have the latest software version.

The Out/In Vario is designed for use as a residential exhaust air blow-out and outdoor air intake unit. Thanks to the patented design of the Vallox Out/In air blow-out and intake unit, the exhaust air discharge velocity can be adjusted in multiple stages, resulting in low pressure loss.

Wall air blow-out is a cost-effective solution for both apartment buildings and detached houses. By using wall air blow-out, significant cost savings can be achieved in the construction of the ventilation shaft.

Yes, Vallox wall air blow-out units comply with the certification criteria of SERT R074: Exhaust Air Wall Blow-out Unit Certification.

The Vallox Aito Kotilämpö unit includes a 6-row liquid-circulated heating radiator in its air heating section. This enables the dwelling to be heated efficiently while maintaining comfort without drafts, even with a relatively low recirculation airflow rate.

Replacing an air heating system with a conventional ventilation system is often expensive, so simply replacing the unit itself is usually a good solution.

Vallox and service centres authorised by Vallox continue to provide the most common spare parts for Valmet Kotilämpö. The price of the spare parts of Kotilämpö can be found in the Vallox spare parts price list.

The installation of an air heating unit is always the responsibility of qualified professionals. During installation, it is important to consider the heating system in use, the condition and insulation of the ductwork, water and electrical connections, the operation of the distribution box, and condensate drainage.

The annual heat recovery efficiency of the Aito Kotilämpö is approximately 77%.

The Vallox Aito Kotilämpö air heating unit restarts after a power outage using the same settings that were active before the interruption.

If the control panel of Aito Kotilämpö reports an error, check the main settings first.

• Defrosting method: Bypass, Indoor %Rh 0, and Outdoor air °C 20.
• Heating settings: Heating method Electrical resistor (Must never be turned off!) Post-heating None.
• Control settings: °C adjustment method Extract air and Humidity Automatic.
• 1/0 and bus settings: External sensor Setting: Air heating. Relay settings: Air heating.

If the error persists, carry out a heater test as follows: When at least 5 minutes has passed since the error message disappeared, check the supply air temperature (°C) from the temperature display of the At home mode and write it down.  Next, test the additional heater. When the test has been on for a couple of minutes, you can exit the test. The supply air temperature should now be higher than previously in the temperature display of the At home mode. If this is not the case, the additional heating resistor or the relay that controls it is faulty. There is no need to carry out a post-heating test; in fact, the test cannot even be carried out, as the ventilation part of Aito Kotilämpö does not have a post-heating resistor.

Filter packages for the Vallox Aito Kotilämpö can be purchased from the Vallox online store.

The model number of the Vallox Aito Kotilämpö is located inside the unit, on the inner wall.

You can find the closest partners in our map service.

You can choose the right group from the following options: authorized maintenance, installation service, ventilation design, retailer, filter retailer or importer.

The type code is provided on the type plate inside the unit.

In ventilation units, the type plate can be found on the inner wall of the unit. In cooker hoods, the type plate can be found either at the bottom of the hood or behind the grease filter. In MyVallox ventilation units, the type code can also be found on MyVallox control, in the Unit information menu.

Original Vallox filters are always supplied in a Vallox cardboard box. They feature Vallox branding and product information both on the packaging and on the label attached to the filter itself.

Older units use black G1 coarse filters and F5/F7 fine filters in accordance with the EN 779 standard.