37" balance

Home Owner from Florida
24 year old Norandex windows  , number on the balance is 3640 , next to that looks like BSI -mb
5 user uploaded images
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Home Owner from Florida

I believe these are S380 , 27" long , sash weighs 26.4lbs

Option 2640 or 2650 ?

3 user uploaded images
Casey
Casey from SWISCO
SWISCO
Expert

Hello,

With this combination of attachments, you could have either the S380-37 or S385-37 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

 You'll also need 3640 spring strength options for your replacement balances to support a sash between 23-30 pounds. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.
Comparison of the S378, S380 and S385 balance shoes.


Home Owner from Florida
2nd pic just above the scale pic
Casey
Casey from SWISCO
SWISCO
Expert

Unfortunately, we are not able to determine exact dimensions from photos. You'll need to confirm the shoe depth needed for your balances to choose the correct replacements. 

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