Balance unit strength

A contractor from Gainesville FL says:
We have replaced glass units in 6 existing windows with units built with laminated glass. The windows are Silverline 2900 series SH and the existing balance units are designated 30-3, 18-5, and 24-5. To handle the additional sash weight Silverline has recommended: 30-5, 18-7, and 24-7. Their 3 week delivery is too long. Can you quote an equivalant unit with delivery prior to Sept 2nd? We need 2 ea. of the 3 sizes. Closest unit I see in your website is a 795 series. But I cannot decipher how to specify balance strength. Rick, Gainesville Windows & More
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
For your query on the weight, see this discussion on S795 weight.
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