Spring and String Sash Balancer

Question

Hi, My sash balancer is 21 inches long for a smaller window, I was told 1930. a smaller window 24 w x 30 tall

I attached the picture of the 2040:

2040 Spring and string balancer which I need, white end is 1 3/32 and 21 inches long wide. This is a much larger window and heavier 36x36

I need two sets of balancers for these two windows.

Casey · Accepted Answer

With this combination of attachments, you could have either the S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

Based on the stamp codes you provided, you would need 1930 spring strength options for your replacement balances. Please note that a 1930 stamp would indicate that you should have a 20" long balance channel. As for your 21" balances, see the 2040 strength option on the balance product page.

All of our balances have a chart under the product description so that you can confirm that the strength options that you choose will support your window sash weight. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.