Broken NUAIR windows

Question

I have 2 identical NUAIR windows that all have broken top slides and are all missing both balance mechanisms. The label on the window frame indicates they are a 900 series windows, DH-R40 with a MST number 4565 and were installed in 1995. The outside dimension of the bottom window including the metal frame that slides is 50.5" wide by 36.5" high. I would also like to replace the wool insulating strips as well. I have not weighed the window yet to finalize the sizing of the balancing mechanism. Please help with the replacement part selection. Mike

User submitted photos of window hardware.

Paul · Accepted Answer

Hey, Mike. I hope I can help!

Let's start with the parts we have. For the top sash guide, see our 18-178. This looks a lot like yours, but just make sure the dimensions match. As for the wool pile, I don't know exactly what you have but Nuair has used our 58-001 and 58-002 in the past. Again, look over their dimensions to see if either can work.

The balance is a little trickier. I can't be sure exactly what you have, but one of the safer options is the Series 385 channel balance. Best case scenario, it fits perfectly. Worst case scenario, the nylon attachments on either end will require some alteration. Don't worry, they're tiny alterations. If the shoe is too thick, you'd have to file it down a little. There is also the possibility that you'd have to clip off the wings. There's a good chance you'll be okay with the Series 385 as-is, though.

The real question now is what length you should choose. Tell me the height of the visible glass and I can work something out for you. Please also tell me the weight of the sash and I can recommend a stamp option. Thanks!