They are made by American Weatherseal. A.W. just shut down their factory. Keep looking.

We purchased windows from Nu Sash of Akron. The windows we purchased (their Integra Line, made in Ohio) have been terrific. They were installed about 2 years ago, we have had no problems and they have saved us a lot of money on our a/c and heating costs.
The salesman claimed we couldn't buy a better window, for any price. We think he was very truthful.

Gee Fred, that's kind of interesting how a bankrupt company installed windows for you. Hope you got a good price.

Here is a link that might be useful: BBB file on Nu-Sash

To be fair, it appears that Nu Sash is operating. It may be that the dealer referenced above is out of business but others are still operating.

I need repair of my Nu Sash window in Louisville, Ky. Does anyone know who may service this window. I have been told the manufacturer is out of business.

I need repair on NuSash windows? Help. Is NuSash still in business?

"They are made by American Weatherseal. A.W. just shut down their factory. Keep looking."

From shortly after the OP posted his original question. So no they are not still in business.