SWISCO - The Replacement Hardware Authority

constant force spring coil, 8lb window sash

A handy person says:
I need to replace the coil on double hung window. all the information I know is:
window (W) is 32 inch
Window (H) is 24 inch
Coil (W) is 3/4 inc
Coil (L) is 38 or 40 inch.

Thank.
Safwat
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Mike from SWISCO responded:
Safwat, are there any numbers or markings printed on the coil balance(s)?
A handy person from NEW YORK says:
there was no number on the coil.

the above provided information is only this I have .please keep in mind that I already ordered 4 coils #S170-334 .under order $ 314678. I installed 2 of them and the window still comes down by itself sometimes. It seemed that I did not consider the tension of the coil when I ordered them. could you please tell me the right tension with the right size based on the provided information. your immediate response is greatly appreciated.

Safwat
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Mike from SWISCO responded:
Thanks for posting, Safwat.

It sounds like the balances you have installed can't support the weight of your window.

Could you please remove your window sash, place it on a scale, and weigh it? Then, report to us the weight in pounds so that we can have a better idea as to what balance would work.
A handy person from NEW YORK says:
ohay I got it.

window weight 8 pounds

coil size 34" width x 40" length.

thanks
A handy person from 33 W. DOVER STREET, VALLEY STREAM, NY 11580 says:
Hello Mike
SECOND REQUEST.
window weight 8 pounds

coil size 34" width x 40" length.
THABKS
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Mike from SWISCO responded:
Safwat, it looks like the proper coil balance replacement for your window is the S170-409 Coiled Balance Spring, which can support window sashes weighing 9 lbs.
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