Paul from SWISCO responded:
February 23, 2017
Many Nuair windows have been known to use our Series 385 channel balance, though this is no guarantee it's what you have. This comes with the 19-005 top and 15-004 bottom, so as long as those match yours you should be okay. For the top sash guide, see our 18-178, but I would again recommend that you compare our information to yours to confirm it's a match. As for why your window's are stuck, your top guide might have broken and the balance slipped up and jamb your sash. Watch the video below for more information.
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