Paul from SWISCO responded:
December 1, 2010
Feel free to post images if you are unsure of the balance series.
SWISCO 28" Series 770 with stamp option 28E will carry a window sash weight range of 28 through 32 pounds. To check if this will work, remove the window sash and place it on a scale. 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. |