need to replace these window coil balances

A home owner from Ohio says:
September 20, 2015
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.
Profile picture of Paul
Paul from SWISCO responded:
September 22, 2015
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:
September 23, 2015
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:
September 24, 2015
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.
Pivot Shoe, 1/2" Thick
Pivot Shoe, 1/2" Thick
15-111
$2.44
7.5 lbs Series 160 Coil Balance
7.5 lbs Series 160 Coil Balance
S160-07
$5.04
How to replace a window coil balance
How to replace a window coil balance
VIDEO
WATCH >
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.