The VELUX TWF/TLF flexi-tunnels and TWR/TLR rigid tunnels are designed to provide daylight into areas of the house such as corridors, stairwells, bathrooms, cupboards, etc where installation of a VELUX roof window is not possible. Both systems incorporate a flat glass rooflight with *clear and clean coating and integrated flashing, a flexi or rigid tunnel, and a white trimmed double glazed acrylic ceiling diffuser.

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