Casey from SWISCO responded:
January 14, 2022
Hello, Your pivot housing resembles the 15-087, which uses the Series 180 coil springs, along with the other items under the related items section of the product page. One thing to note is that a 48-pound window sash is rather heavy for this type of coil system. Your original coils should have numbers stamped on them to confirm the corresponding strength options. If you're confident about the weight of your sash, I believe you will need two S180-9 and one S180-4 on each side of your window to support a total of 48 pounds. Thank you. |