Paul from SWISCO responded:
March 22, 2017
I would consider our S385-14 channel balance. Based on your stamp, the metal channel should be 14" long, not 15". I would double check that just in case.
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Casey from SWISCO responded:
March 24, 2017
Your stamp "13 4" normally translates to 1340
To check, remove and weigh your window sash; a pair of 1340 will carry a window sash weight range of 11-12 pounds. |
Tom from SWISCO responded:
March 29, 2017
I'm not sure either. It's possible whoever installed these balances to begin with installed the wrong ones. You can see the chart on our S385-14 store page that shows you how much weight each option can carry. This information comes from the factory itself, where these springs are calibrated, so I promise they are accurate.
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