I have different balances in each window

A quick learner from Tampa says:
I am ordering several channel balances and have a few questions.
I have identified the right balances.
(29" Series 385 Channel Balance):
1.) Every window has two different balances:
(1) marked 28E
(1) marked 28C, every so often there is a 28D...
Why would balances be mixed like this?
2.) What can be done for a balance that still works but is very noisy?
Profile picture of Paul
Paul from SWISCO responded:
The manufacturer might have a reason to balance out the sash weight. I think it would be best to order what you have in the sash already. The 28C would be our 2830, the 28D is our 2840, and 28E is our 2850.

If you still aren't certain, you can give us the weight of each of your sashes and we can suggest an option for each.
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 4-7 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 856-317-6263 or at help@swisco.com.