Tom from SWISCO responded:
June 19, 2017
Assuming that you are correct in identifying your balance as an S385-25, and that your window sash weighs 30 pounds, you would need a 2465 stamp option.
If "30 pounds" is an estimate, you will want to weigh your sash to be certain. A 29 pound sash would be best with a 2460 stamp, so it's best to be precise. However, as I just said, if the sash does, in fact, weigh 30 pounds, 2465 is the proper stamp. Let us know if you think that sounds right. |