SWISCO - The Replacement Hardware Authority

need to replace these window coil balances

A home owner from Ohio says:
the height of the coil housing is *3 1/8" from the bottom screw to the top of the plastic guard. the window channel is approx. 1 3/8" wide x 9/16" deep.
based on your formula, i believe these are 15 lb. balances.
User submitted a photo of a window balance.
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Paul from SWISCO responded:
Thanks for posting. The formula you mentioned actually isn't the most accurate way to determine sash weight. Is it possible for you to weigh the sash on a scale? In this situation I think it would be better. Thank you!
A home owner from Ohio says:
I was able to borrow a scale and the weight of the sash is approx. 28.2 lbs.
Can you please tell me the coils I need and the corresponding shoes to match.
I need to replace all the coils and shoes for two windows of the same weight. I am not able to use either window because there is no coil support left.
Please help.
Profile picture of Paul
Paul from SWISCO responded:
Perfect, thanks. I believe the pivot shoe could be our 15-111, but you will need to compare our measurements and pictures to your own shoe to confirm. As for the coil spring, with a sash weight of 28 pounds I recommend an S160-7 spring on each side. Each individual S160-7 spring can hold a sash weight of 7.5 pounds.
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