metal atrium window 28 3 kw cmc 1
Hello,
Take a look and compare the specifications of the S395-29 channel balance with a 2830 strength option, which has a winged top and non-winged bottom attachment, to your assembly.
You mentioned that your window won't lock. Do you suspect that the balance could be too long? If so, I would recommend checking an identical window in the house that is functioning properly to see if the balance specifications match the one shown in your photos.
It does look like the tape measure shown in your photo indicates that your metal channel is 29" long but I would recommend measuring the exact height of the visible glass in your window sash, which will give us a better idea of the length that would work best in your window.
You are welcome to order two of both lengths directly on our website but we can't be sure if using a different size balance would correct the problem based on the information you've provided so far. If you decide that you want to try both length options and need to send back one or both pairs, our return policy can be found here.