Bob from SWISCO responded:
October 7, 2023
Hello there. This looks like a 15-102 Double Carrier, which works with Series 145 Coil Balances. Let me know if you have further questions. |
Bob from SWISCO responded:
October 10, 2023
The window sash size unfortunately doesn't allow us to determine that. Instead, you will need to weigh your sash on a scale and then divide it by how many springs support it, in total. In your case, that's four: two on each side. So, for example, if your sash were to weigh 20 pounds, you'd want two 5 pound springs on each side. |