Thats interesting. I asked the live chat support if they were still offering the local install and they said no. I asked if they had started installing them at the factory and their response was "Yes they have!"
This is interesting. Why do people thing range/efficiency increases with temperature? I would assume the curve to look like an upside down U where efficiency goes down when heat or AC is being used and peaks when AC/heat isn’t being used. Of course you don’t have enough low temp data yet, but...