Channel balance replacement STAMPED: BSI 2900

A home owner from Gainesville, GA says:
October 15, 2020

Hi - my windows are 22 years old, and it seems they are all having channel balance issues. Can you identify this? I don't know the brand, but the number stamped in I2900 BSI LD

Thank you! Genna 

Thumbnail of the uploaded file named Vd2MS.jpeg
Thumbnail of the uploaded file named IMG_6916.JPG
Thumbnail of the uploaded file named IMG_5387.JPG
Thumbnail of the uploaded file named IMG_5092.JPG
Thumbnail of the uploaded file named IMG_1002.JPG
A home owner from Gainesville, GA says:
October 15, 2020
The number 2900 does not have an I in front, that was a mistake. The weight of the sash is 16.8 lbs. The length of the channel is 29"
Profile picture of Casey
Casey from SWISCO responded:
October 19, 2020

Hello,

Take a look and compare our S770-29 channel balance to yours. Based on the sash weight that you provided, you will need a 29B strength option to support a sash weight from 12 to 18 lbs. Thanks for posting! 
29" Series 770 Balance
29" Series 770 Balance
S770-29
$12.80
How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
VIDEO
WATCH >
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.