I've probably got ahead of myself. I've ordered two of the S380?29 29 inch series 380 channel balance. Please contact me and let me know if I screwed up. By the way the window sash weighs 20.4 pounds.
Thank you very much.
Hello,
With this combination of attachments, you could have either an S380-29 or S385-29 channel balance. You’ll need to measure as shown below to confirm. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.
The 28D stamp on your balance would generally indicate that you would need a 2840 strength option but if your sash weighs exactly 20.4-pounds, then the 2830 strength option that supports between 16 and 23 lbs would work for you.
Thank you and let us know if you have any other questions or concerns.
