BALANCE ASSEMBLY ON DOUBLE HUNG WINDOW

A handy person from NANUET, N.Y. says:
May 25, 2021
Hi,
I NEED THE BALANCE FOR THE LEFT AND RIGHT SIDE OF A SMALL SIMONTON DOUBLE HUNG BATHROOM WINDOW.
THE WINDOW MEASURES 20 HIGH X 24 IN WIDE.
THE WINDOW IS TILT-IN FOR CLEANING, AND WEIGHS A LITTLE OVER 10 POUNDS.
I HAVE ATTACHED A PHOTO AND WINDOW SPECS FROM THE SASH.
THERE WERE NO NUMBERS ON THE BROKEN SPRINGS.
THANKS, TOM
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Emily from SWISCO responded:
May 27, 2021

Hi there!

Take a look at our 15-192 pivot shoe which is used with the Series 170 and Series 171 coil springs. Look over our dimensions and compare them to your current hardware to see how they match up. 

detail of 15-192
detail of 15-192
A handy person from NANUET, N.Y. says:
May 28, 2021
The measurements match up with my current pivot shoe. Looks like the Series 170 should work but what balance number will I need to order the correct coil? The window weighs about 10 lbs., there is no number stamped on the old coil.
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Emily from SWISCO responded:
May 28, 2021

If there are no numbers or stamps on your coil, you'll need to weigh your sash and divide the precise weight by the number of coils on both sides of the window to choose the appropriate weight option. 

Let me know if that helps. 
A handy person from NANUET, N.Y. says:
May 28, 2021
So if the sash weighs 10 pounds, I would need two 335 coils (1 per side)? Each 335 coil will support 5 lbs.
Am I figuring this correctly?
Thanks for your help!
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Emily from SWISCO responded:
June 1, 2021

Yes, that's correct! 
CertainTeed Pivot Shoe
CertainTeed Pivot Shoe
15-192
$6.39
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