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Tom from SWISCO responded:
August 13, 2020
Sure, for old wood windows like this we usually recommend the Series 500 spiral balance. To determine the proper length, you want to add 3" to the visible glass height for the bottom sash and just 1" for the top sash. So in your case, you want an S500-17 for the bottom sash on the first window. You didn't mention if the second window was a top or bottom sash, but assuming it's a bottom sash you want an S500-27. You'll also need something to connect the sash and the spiral balance. That would be the 17-012 bracket. A 75-005 charging tool may also be useful for you. |
