Alenco window balance replacement

Question

Hi, I've got a window that needs both balances replaced. The window is Alenco manufactured, approximately 20 years old and the balances are stamped with 2790 and 31. Can you please confirm which of your replacements I should order? In the chart showing assist weights, this number is not shown, thank you.

Bob · Accepted Answer

I believe this is an S395-28 Channel Balance. Look it over and see if you concur. I believe that 31 indicates your window sash weighs 31 pounds; you can weigh the sash to confirm. If so, use a stamp option of 2760, for a sash that weighs 30 through 33 pounds.