Retrofit trickle vent in Velux window

3 Dec 2020
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United Kingdom
I have a wood velux roof window which is not accessible without a ladder as it faces down onto the landing.

it is gathering a lot of condensation from the Bathroom below and a new bathroom fan hasn’t reduced the condensation at the bottom of the window.

I want to know if I can retrofit a trickle vent at the bottom of the velux window. Is this possible or is a replacement velux (or alternative) with a trickle vent the better option.
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That's what I thought, just pulling the bar down one click opens the trickle vent I thought?
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It’s an old one which is located far away but I didn’t know about the one click thing. I’ll try it in the morning and see.
Velux sell extendable poles to open windows that are hard to reach. ZCT 200K

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