Tom from SWISCO responded:
July 13, 2020
You may need 7 pound springs, but I'm not 100% sure. That "AE" marking isn't something I'm familiar with. A good way to confirm is to simply weigh your sash on a scale, then divide that by how many springs support it. For example, if your sash weighs 14 pounds, and it's supported by two springs (one on each side), then 7 pounds would be correct. |