SWISCO - The Replacement Hardware Authority

Certainteed Couterbalance Identification

A home owner from Knoxville, TN says:
The coil has broken into multiple pieces. Coil width is 3/8" and I see a stamped "HL" on one piece and just "H" on the other. It looks like the Series 140 dual coil, but I'm not sure of the weight. Do I need to take the sash off and weigh it? Also, the coils were only screwed into one side of the bottom piece, and the top piece has two screws to attach it in the channel.

Thanks!
User submitted photos of a window balance.
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Tom from SWISCO responded:
Thanks for posting. The shoe looks like our 15-177, check it out and let me know what you think. If that's a match, I also recommend our Series 152 coil spring.
A home owner from Knoxville, TN says:
Thanks for the response. Yes, I agree this is the 15-177 shoe. Even though the window originally had two coils, using a single Series 152 with the correct weight should work OK?

And when I weigh the sash, should I get that weight for each side or should the two springs "add up" to the full weight?
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Tom from SWISCO responded:
I supposed you could substitute two springs with one, but we always recommend sticking with the same setup you have now to avoid any unforeseen issues. As for calculating sash weight, coil springs are different from other balances in that you want to divide the weight between each spring. For example, if your sash weighs 20 pounds, you want four 5 pound coil springs; if your sash weighs 10 pounds, you want two 5 pound coil springs; and so on.
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