Have a unit working it’s way across the country. Delivered to a hub in Illinois this morning when the temperature was -9F. It will be loaded for delivery to my house when it’s about zero F. Not so much worried about the delivery temps.
Figure it will take 4 to 6 hours for the coolant to warm once it’s in my house with it turned off. I put a remote temp sensor inside my current GF as a test and you would be surprised how difficult it is and how long it takes to get the inner components to a working temp once it gets cold.