Paul from SWISCO responded:
June 29, 2017
I can see why you're confused. These balances can be a bit tricky. For your 3052 Andersen window, if you have the old Narrowline using 3/8" welded glass, I recommend the 24-1033. If you have the newer style with the 5/8" thick insulated glass, I recommend the 24-1133 instead. This difference in glass size may be why you got two different suggestions.
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Paul from SWISCO responded:
July 17, 2017
It looks to me like you have the newer style Narrowline, in which case the 24-1133 may be your best bet.
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