2830Y - identify window balance

Question

Want to replace all windows, Double Pane 1991 Built. Also have to check on 2 other windows I believe to be 2840 My Measurements were 7 windows 33 and 2 43. Would need all clips to make all windows like new. What do I need.

User submitted photos of a window balance.

Tom · Accepted Answer

I'd guess that this configuration (wingless attachments on both sides) is a Series 390. The shoe should measure 1-1/8" in depth, if this is the case. If not, consider the Series 351, for a 1" shoe. The 2840 probably refers to a 29" balance with a 2840 option, and 2830 is probably a 29" balance with a 2830 option. You can measure the metal bar to check the length, and weigh the window sash to check the option.