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HANDBOOK
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| THE ORIGINAL BOX SASH WINDOW COMPANYS sliding sashes with SASHSEAL draught control system and sealed unit double glazing (viewed from outside) |
| Unobtrusive, high efficiency sealed glass units and air seals provide the best possible performance. |
| SASHSEAL - Draught control SASHSLIDE - Draught control PLUS overhaul to get the window working SASHSAVE - Draught control PLUS overhaul PLUS renovating the timber |
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