The WinTwin R1 sash window system set with counter-weights is great in many respects. Whoever has the space to accommodate it can count on the smoothest possible window operation.
Booklets with measurements and 1:1 drawings may be found here, together with a few calculations in order easily to assemble a complete sash window. The booklets can be viewed as .pdf, and printed on A4 format.
> installation details 44mm (1.3Mb)
> installation details 56mm (1.3Mb)
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