Tom from SWISCO responded:
January 19, 2017
Start by looking at our S380-35, I think this may be a match. I recommend weighing your sash on a scale to determine the proper option.
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Tom from SWISCO responded:
January 23, 2017
I would double check your sash weight. If it is 35 pounds, the 3450 option may not be strong enough. We could custom make a stronger spring, but we'd have to know the exact sash weight.
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