I have a broken inner pane on the lower sash and would like to find a replacement sash. I am having trouble identifying the manufacturer.
I am guessing it is a 26 inch square window since it measures 25 1/4 wide by 26 3/8 tall.
Here are the markings on the window:
PAT (VA), SPEC NFRC, SERIES VWDH, MST 3856,PAT M 490, NFRC 100-200, and PAT-M-040.
I can post photos if that's needed. Can you help?