15 lb balance for thermal double hung

Quick Learner from St. Louis, MO

May 10, 2024 4:04 pm

Looking for a 15lb dual coil constant force balance for a Thermal 9500 series double hung window.

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Bob from SWISCO

May 10, 2024 10:00 pm

EXPERT

Thanks for posting. This looks like the 15-252 Dual Coil Support. Please compare. This support uses Series 160 Coil Balances. To reach the stated 15 pounds, use two of the S160-07 7.5 springs, sold separately. Let me know if you have further questions.

Detail of 15-252

Quick Learner from St. Louis, MO

May 13, 2024 2:24 pm

That coil support does look similar but the one that I took out of the window is 4" tall by 1 1/4" wide. Do you know if the S160-07 springs will work in that support. I would assume so but I hate to assume anything if you know what I mean. Thanks for your help, I appreciate it.

Bob from SWISCO

May 14, 2024 11:37 am

EXPERT

The length is definitely different, but in my experience that shouldn't matter so much after they're installed. And yes, the S160-07 is fully compatible with the 15-252.

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