Help with Parts Please

A home owner from Greensboro, NC says:
I have 8 windows that need balances. 3 of the 36"x32". 3 of the 32"x34". 2 of the 36" x 24." (These are the dimensions of the lower frame. See pics please.) They are double-hung tilt-in windows made in the late 1990s. I've attached pics of the mechanisms, parts and labels.
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Emily from SWISCO responded:

Hello there. Thanks for reaching out to us. Are you able to remove an undamaged balance from the window and show us some photos? I'm afraid that's the only way for us to help. If the hardware is missing, we won't be able to assist. 

A home owner from Greensboro, NC says:
I have a 9 second video that captures the entire assembly. The site here will not allow me upload it. Is there an email I could send it to?
A home owner from Greensboro, NC says:
Swisco -

I have 8 windows that need balances. 3 of the 36"x32". 3 of the 32"x34". 2 of the 36" x 24." (These are the dimensions of the lower frame. See pics please.) They are single-hung tilt-in windows made in the late 1990s. I've attached pics of the mechanisms, parts and labels.

Please let me know if you have any questions.

Thanks,
Chris
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Emily from SWISCO responded:

Thank you for the additional photos, Chris. It looks like you have an old rod balance assembly. I'm confident we have a replacement but I'm just not able to fully identify it yet. May we see a photo of the shoe this balance uses? Note that you may need to fully remove the sash in order to see it. 

A home owner from Greensboro, NC says:
Here are 5 pics of the shoe. (The site only allows for 5 pics.) I have more from the top, bottom and as it sits in the window if these help. Hope these help. Thanks again for your help.
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Emily from SWISCO responded:

This is perfect! My recommendation is the Series 795 as long as the spring diameter is 1/2". I recommend measuring yours just to be safe. If it's indeed 1/2", the video below will guide you through the steps to convert to the modern S795.

A home owner from Greensboro, NC says:

Great! I think we're really getting close. You're right, the spring is 1/2". After watching the video, the 15-194 channel balance looks like it's the one. Also, the pivot bars look like the 26-021. I've weighed the sashes too. 

Regarding the length of the balance needed, I don't have any intact balances to measure, so my measurements in the attached pics are just sash measurements. What would be your advise here? I've heard that a rule of thumb is to take the sash measurement and then subtract 2 inches. I really appreciate your help and thanks for helping me drill down these important details. Thanks!Chris

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Paul from SWISCO responded:

Thank you for waiting while we looked into this.

From my calculations, I came up with the following.

Window sash size:

36 X 32 = S795-30 spring weight (30C) for sash weight 19-24 lbs. 

32 X 24 = S795-22 spring weight (22C) for sash weight 16-21 lbs. 

32 X 32 = S795-30 spring weight (30C) for sash weight 19-24 lbs. 

The pivot bar will be the 26-021. However, I recommend you weigh each window sash to confirm the accordant spring weight options. 

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