Humidity-controlled trickle vents

Humidity-controlled trickle vents automatically adjust incoming airflow according to indoor humidity levels. They support background ventilation without the need to open your windows or adjust the vents manually each day.

Humidity-controlled trickle vents

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    OKNOPLAST humidity-controlled trickle vents. Ventilation that responds to indoor humidity
    Airtight windows help reduce heat loss, but your home also needs effective ventilation. OKNOPLAST humidity-controlled trickle vents support the supply of outside air, automatically adjusting airflow to indoor humidity levels.

    How do humidity-controlled trickle vents work?
    Fitted to your windows, these vents open wider as indoor humidity rises, allowing more air to enter. When humidity falls, they reduce the opening to limit airflow. This adjustment happens automatically, without everyday manual control.

    What are the benefits?
    – Automatic operation. The vents respond to changes in humidity without manual adjustment.
    – Fresh air with your windows closed. They support everyday background ventilation.
    – Controlled airflow. At lower humidity levels, the vents reduce airflow, helping to limit ventilation heat loss.
    – Moisture management. Working alongside effective extract ventilation, they help reduce moisture build-up and the conditions that encourage mould growth.