Coil Balance weight

Quick Learner from Los Angeles, CA
I have a window that needs four Series 145 Coil Balance.

The window weighs 8lb 14 oz. Do I need 2 or 3lb coils?

I have the Double Side Load Carriers already.
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Jasmine
Jasmine from SWISCO
SWISCO
Expert

Thanks for posting! Since the window weighs between 8 and 9lbs, I would suggest using the S145-2 Balance Spring to complete your assembly.

A 3lb coil would be tensioned for 12lbs of weight, which would be too strong for your sash.

Please feel free to reach out with any questions.

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