What is a Trickle Vent?
A trickle Vent is a device usually fitted at the top of a window that allows fresh air to circulate naturally trough a room, and allow polluted air out. They are controllable, to give the option of having them open or closed. When used correctly, trickle vents do not contribute excessively to heat loss. Trickle vents also work in conjunction with mechanical extract fans when more immediate ventilation is required. The vents are either fitted to the windows frame (slot vents) or sometimes between the glass and the windows frame (glazed-in-vent).
