Marvin balancers for replacement

Home Owner from Santa Rosa, CA
Sep 21, 2024 4:09 pm
Older single hung aluminum double pane window, need replacement. Windows old enough no numbers/model stenciled on window. Total length balancer 28" aluminum 27 inches. Do I need to weigh window or is this enough?
5 user uploaded images
5 Replies

Emily from SWISCO
Sep 25, 2024 10:37 am


Hello there!
Thanks for reaching out to us. You don't have to weigh the window. We're happy to look into this but can you also show us a photo of the inside of the metal channel where the innerspring connects to the pulley mechanism? That'd be located in the middle of the channel.

Home Owner from Santa Rosa, CA
Sep 25, 2024 5:27 pm
Follow up photos to Emily
2 user uploaded images

Emily from SWISCO
Sep 26, 2024 8:29 am


Thank you kindly! Based on your uploaded photos, you can use the S380-27 or S385-27 with the 2640 stamp option. The difference between these two Series is the depth of the bottom shoe so you'll have to measure as shown below.
Let me know if you have any questions!

Comparison of the S378, S380 and S385 balance shoes.

Home Owner from Santa Rosa, CA
Sep 26, 2024 1:05 pm
Thanks! Great service
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