For the record, the Nuheat (and other) thermostats are versions of the OEM OJ Electronics. Prior to understanding that I had a hard time finding out whether there are variations in hardware in the “Signature” series … Nuheat doesn’t list OJ model numbers.
I just purchased a “Nuheat Signature” (from G&G in NYC) marked on the box with:
- SIGNATURE (RPN:AC0055)
- Type: NU-BEST-4999
- UPC: 62071300171
Internally it marks the manufacture date as 03/2019.
It seems to be the OJ UWG4-4999 with EAN 5703502900520 though the Nuheat plastic cover varies from the “standard” UWG4 Microline. Such is the nature of modern manufacturing.