Prism Window Broken Balance on exterior top window

A handy person from Denver, CO says:
October 12, 2023
I appear to have a Prism Window, as identified on the window lock. The left hand side of the window balance is stuck in the groove and separated from the post connected on the window. Appears to have a double coil spring. I need to get the specification on what size coil spring i need to order for this window.
Thumbnail of the uploaded file named Prism Window Balance_photo_001 (2).jpeg
Thumbnail of the uploaded file named Prism Window PN_photo_001.jpeg
Thumbnail of the uploaded file named Prism Window_photo_001.jpeg
Thumbnail of the uploaded file named Prism_Window_balance2_photo_001.jpeg
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Lauren from SWISCO responded:
October 13, 2023

Hello, thank you for posting,

It appears you have an older coil balance assembly that is no longer made. We recommend converting to the 15-259 pivot shoe and Series 159 coil springs. Please review the step by step video that details the conversion and additional parts needed. 

Let us know if you have any additional questions! 
A handy person from Denver, CO says:
October 24, 2023
Thank you. The window pane weighs 20 lbs and has two coil springs on each side. Are you saying that I should convert this to a single coil spring design?
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Lauren from SWISCO responded:
October 24, 2023

If the window weighs 20 pounds, I recommend sticking to a double coil setup to get the exact weight support. You can stack (1) S159-4 and (1) S159-5 coil spring on both sides of the window using the 15-256 double support. 

Please review and let me know if you have any additional questions. 
Coil Balance Pivot Shoe
Coil Balance Pivot Shoe
15-259
$2.57
Pivot Bar, 2-1/2"
Pivot Bar, 2-1/2"
26-083
$1.12
4.5 lbs Series 159 Coil Balance
4.5 lbs Series 159 Coil Balance
S159-04
$5.92
5.5 lbs Series 159 Coil Balance
5.5 lbs Series 159 Coil Balance
S159-05
$5.97
3/4" Coil Double Support
3/4" Coil Double Support
15-256
$1.15
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