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Sorted, The GZL is not compatible with GGL. When replacing the Sash ( Window only ) Exact model is required Over and Out

Hi Hope your all good As the title suggests my loft window needs to be replaced. Was hoping to just replace the window part only keeping the existing flashing and frame in place. Wanted to know if the following models will be compatible with my window to save on costs. Centre Pivot Loft window - 78 cm x 118cm Current window: GGL - M06 - 3509 Alternatives: GZL - MK06 - 1051 From research the only difference between GGL and GZL is a the addition of a ventilation flap MK06 is an updated M06 MY question is, will the GZL - M06 windows fit the current frame perfectly or does the exact same model etc need to be ordered.. Hope to hear from you soon Thanks in advance