There aren't any NSF certified air conditioners, so no restaurants with an air conditioner in their commercial kitchens have them NSF certified.
We are running in thousands of inspected commercial kitchens and inspected meat processing operations with no problem. Many people also build their own coolers and use FRP (fiberglass reinforced panels) on the inside. There are NSF certified walk-in cooler panels. You can check with your local department to find out if that's necessary.
One inspector was concerned that the CoolBot was not NSF certified. Our controller is legally classified as a thermostat, and there are no NSF certified thermostats. It is of course okay to have a thermostat in a kitchen (even smart programmable thermostats).
The best thing to do is ask your local inspector ahead of time. We have 27,000+ units out there, thousands of which are in commercial kitchens. We would be happy to speak with a local inspector who is concerned or questioning the idea.