In combination with upstands, ventilation frames are available, made of PVC multiple walled with condensation collector, 30 cm manual or electric travel, single or tandem (depending on size), or longer travel on request.
Roof access (* mark in the sizes table) are ventilation products with 2 extra arms for easy 90ο roof exit. All metallic elements of frame (hinges, screws etc) are of stainless steel.
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