We're having some new widows fitted in our extension and have requested that they have trickle vents fitted. Is this a wise option or should I change them to without?
We did an extension 3 years ago with 2 new windows and lots of the others were replaced. We used T&T without trickle ventilation. Trickle ventilation causes lots of draughts and cold air dropping to the lower parts of the room and thus cooling of the walls. THIS will not help with damp / condensation on cold surfaces. There are studies out in the public domain that show that it is much more effective to open a window wide for 5min and allow a big exchange of the air volume but you will still maintain the heat in the brickwork. Do this a couple of times per day. Trickle vents are not good for large volume air exchange
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