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Window vents

Trickle vents provide a constant supply of fresh air without opening the window. Humidity- or pressure-controlled — they work automatically, quietly and without draughts.

Choose the type for the ventilation method in your house

Types of vents

Self-regulating vents

Self-regulating vents

The amount of supplied air depends on the pressure difference between inside and outside. During sudden gusts of wind, small flaps in the vent swing and limit the flow. The user can manually close the damper to reduce the inflow to a minimum. Simple, trouble-free design without electronics.

Manually controlled vents

Manually controlled vents

The user regulates the amount of supplied air themselves by opening or closing the damper — sliding or rotating knob. Full control from complete closure to maximum flow. Ideal for people who like full control over the indoor climate.

Humidity-controlled vents

Humidity-controlled vents

The flow is regulated automatically by air humidity — a polyamide tape sensor contracts or expands and opens the throttle valve when humidity is high and closes it when dry. No electronics, no maintenance. Enables correct ventilation without cooling down the room.

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FAQ

Frequently asked questions

Yes — since 2014, Polish building law has required vents in rooms with gravity ventilation if windows have a tightness coefficient of less than 0.3 m³/(h·m·daPa⁰·⁶⁷).
Standard vents have a flow rate of 20–50 m³/h at a pressure difference of 10 Pa. For a typical room of 20 m², a class 2 vent (35 m³/h) is sufficient.
Vents certified for use on busy roads have an acoustic class of up to 38 dB. Special sound-insulating models achieve insulation of up to 45 dB.
Self-regulating ones react to pressure differences (wind) — they open during gusts. Humidity-controlled ones react to air humidity — they open when humidity in the room is too high. Humidity-controlled ones are smarter and more energy-efficient.
Yes — vents are installed in a milled opening in the window frame. Installation does not require removing the window and can be carried out by an authorised Budvar service.

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