Which option do I use?

A quick learner from USA says:
April 9, 2009
Sash weighs 21 lbs. Which option do I use?
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Donna from SWISCO responded:
April 9, 2009
The 3230 option. The 3230 stamp will carry a window sash weight range of 18 through 23 pounds.

This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
A quick learner from Seattle, WA says:
December 11, 2010
What option do I choose for sash weighing 29 lbs? Thank you!
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Donna from SWISCO responded:
December 12, 2010
For replacing 33" Series 380 balances, stamp option 3250 will carry a window sash weight range of 28 through 32 pounds.

This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
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