Window ventilation Fresh air supply in the house

Titon XR16 Trickle Vent - White window slot vent Internal 4000 compact Link Trickle Vent suitable for PVCu casement windows EQA: 4000mm2 EQ with 13mm rout window slot What is A Trickle Vent? In basic terms, when a window is manufactured, a slot is drilled into the plastic frame, and a cover is placed over it The

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