Replacement uPVC trickle vents set including an internal white window vent with an on/off switch for maximum air flow or closed position. The outer canopy is a chartwell green finish most associated with cottage type windows. 4000 square millimetre or 2700 EA with a 12.5mm slot. A 16mm slot will give 3200 EA rating. The external canopy includes a grille for some insect ingress protection. Ideal for upvc windows or any window with a routed slot.
