Ventilation

Grey Gravity Flap for 100 mm / 4" Round Wall Outlet - Ventilation Duct Cover with Non-Return Shutters and Rear Spigot

Timco - Timloc Internal Plastic Hit and Miss Louvre Grille Vent - White - 1208W (Size 260 x 104 - 1 Each)

AirTech Grate Cover Gravity Aerator Hatch (125 mm Pipes) White External Ventilation Cover

Timloc Louvre Grille Vent Flyscreen White - 242 x 89mm

Round Ventilation Grille with Adjustable Duct Size from 4" to 6"

White Gravity Flap for 100 mm / 4" Round Wall Outlet - Ventilation Duct Cover with Non-Return Shutters and Rear Spigot

Timloc Underfloor Vent Horizontal Rear Extension - + 100mm

Black Gravity Flap for 100 mm / 4" Round Wall Outlet - Ventilation Duct Cover with Non-Return Shutters and Rear Spigot

HomeSmart Terracotta Brick Weep Vents, Pack of 10 - 100mm x 64mm x 10mm, Ideal for Wall Ventilation

HomeSmart Grey Brick Weep Vents, Pack of 10 - 100mm x 64mm x 10mm, Ideal for Wall Ventilation

125mm White Plastic Cowled Outlet with Gravity Flap (5" Spigot)