Paul from SWISCO responded:
January 25, 2013
Thanks for posting, Art. These are all good questions. The stamp of 28D corresponds to our 2840 option. However, this usually means that your metal channel should measure 29". Are you sure it's only 27" long? Does it look like it may have been cut down? If it is, in fact, 27", then you will need to weigh your sash and match it up to the options shown for the S380-27 in order to find the correct one.
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Paul from SWISCO responded:
January 29, 2013
Great! In that case, see our S380-29 with a 2840 option.
I can't really say what top sash guide you need. Top sash guides aren't determined by the balance, but by the sash itself. To know what you have, I'd have to see a picture of it. That said, if the 18-180 matches yours in both style and dimensions, I think it's a good bet. These balances have a good life expectancy, but such a thing is always hard to judge. It really depends on how often they're used. |