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The pressure switch is connected using a three-core cable located on the top of the airhandling unit. Look for a black cable with three conductors. The green and white conductors are used for this function. When contact is established between the green and white wires, the unit will automatically increase the supply air flow. The third conductor is normally not used in this connection. If you are an end user and not comfortable performing the connection yourself, we recommend contacting the service company that installed the system or the retailer where the product was purchased.

The recommended maximum duct length depends on the duct diameter. For a 100 mm duct diameter, the recommended duct run is up to approximately 90 cm. For a 125 mm duct, the recommended duct run is up to approximately 5 metres. For a 150 mm duct, the duct run can be approximately 8–10 metres. Duct runs longer than recommended may result in reduced airflow and poorer performance.

Control cables for the control panel must be installed with a minimum distance of 30 cm from power cables. This requirement applies to Flexit ventilation units as well as the EcoNordic indoor climate unit. Correct cable separation helps ensure safe operation and reduces the risk of signal interference.

Flexit’s spare parts policy states that spare parts shall be available for a minimum of 10 years. In practice, we often have spare parts available for products that are significantly older than this. The goal is to ensure predictable operation, easier service, and longer product lifespan. Updated and more detailed information about spare parts is available on our website.

The noise level of a room ventilator varies between models and depends on factors such as fan speed and installation conditions. Sound levels are typically stated in dB(A) and measured at different operating modes. At low speed, the noise level is lower and suitable for bedrooms and living areas. At higher speeds, the noise level increases and is used when additional ventilation is required. Detailed sound data for each model can be found in the room ventilator brochure.

Flexit recommends that ventilation ducts are inspected every six years. During the inspection, the need for cleaning is assessed based on the condition of the ducts, usage and surrounding environment. It is not always necessary to clean the ducts at every inspection, but cleaning should be carried out when there is visible dust and dirt or reduced airflow. If needed, Flexit can help you find a qualified company to perform inspection and cleaning safely and correctly.

The fan motor in a central exhaust system should be cleaned at least once a year. Regular cleaning helps ensure correct airflow, reduces wear on the motor, and prevents noise and operational issues over time.

The low-voltage cable from the wall inlets must be connected to the terminals on the central vacuum cleaner’s control board. These connection points are usually clearly marked and easily accessible on the unit. The cable must be connected to both terminals, and polarity does not matter. Make sure the connection is secure, that the cable is not pinched, and consider fastening it along the pipe system using cable clips. A detailed illustration of the correct connection can be found in the installation manual, typically shown on page 13.

The EcoNordic unit itself has dimensions of 120 × 65 × 190 cm. In addition, extra space must be allocated around the unit to ensure good access for service and sufficient room for ductwork and other connections. Requirements for the installation room and necessary clearances are described in the documentation for preparatory works and should be used as a basis to ensure correct design and installation.

Roomie Dual can be installed in walls with a thickness from 280 mm to 500 mm. Roomie One is suitable for wall thicknesses from 240 mm to 500 mm. If you want to install Roomie One in a thinner wall, a dedicated external cover can be used, allowing installation in walls down to 150 mm thickness. The article number for the thin-wall cover is 116003. For correct installation, we recommend following the installation instructions and watching the installation video for room ventilators.