Framevent is an attractive window ventilator, made from the highest quality UV-stable material. Suitable for timber and PVCu windows, Framevent trickle vents are offered in two common sizes and a range of colours to match your window profile. These window ventilators by RW Simon, reduce the chance of mould, condensation, and water vapour in the air, by increasing the airflow. Fitting new trickle vents, or replacing old damaged vents, can improve the air quality in a room, and reduce draught and noise. Both the hoods are secured with screws, which are then hidden by decorative end covers that just snap into place. Why is ventilation important? Adequate ventilation, inside homes and other buildings, will prevent damaging excess condensation, and maintain good levels of air quality. Trickle vents are a quick and easy method of providing the necessary ventilation.