Casey from SWISCO responded:
February 23, 2018
Thanks for your inquiry. The "2240" option on our S385-23 channel balance indicates that the spring strength will hold a sash weighing 19-23 pounds. Does that sound about how much your sash weighs? If you're unsure, the only way of confirming the precise weight of your sash would be to remove it and weigh it on a scale. You also may send us photos of your balance for us to take a look at to see if there any other suggestions we can offer.
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