They remove stale air from your property.
Small window trickle vents.
Trickle vents are small openings in a window.
These are small discreet plastic or metal modules that are housed at the top of a door or window frame.
A trickle vent is a very small quantify opening in a window or other building envelope component to allow small amounts of ventilation in spaces intended to be naturally ventilated when major elements of the design windows doors etc are otherwise closed.
Trickle vents have the following advantages.
If this isn t known habitable rooms should have trickle ventilator of 5000mm2 equivalent area and wet rooms should have 2500mm2 equivalent area.
What are the alternatives to trickle vents.
If you re replacing windows with trickle vents the ventilators should be no smaller in geometric open area than the existing ventilators.
These small openings allow air into the property.
Trickle vents now form part of the building regulations.