Replaceing Balance Spring Side Load Single Hung Window

Quick Learner from Orlando, FL

Oct 21, 2015 11:05 am

Have 2 separate window balance springs need to be replaced, 2 windows with the same markings and the other a different one. Markings are on one is 26D and the other 28C no other markings.

User submitted photos of a window balance.

4 Replies

Tom from SWISCO

Oct 22, 2015 1:51 pm

Thanks for posting. This looks like our Series 380 channel balance. Check it out and let me know if you agree.

Quick Learner from Orlando, FL

Oct 22, 2015 1:53 pm

P.S. Have not weighed them yet either how accurate must I be? If close should I go up to next weight class?

Thanks again

Tom from SWISCO

Oct 22, 2015 2:07 pm

We don't recommend going over what you need. A balance that is too strong could cause complications in operation. A stamp of 28C usually corresponds to our 2830 option, but weighing your sash to confirm is a good idea.