23 degeees last night.
Yet it was already a comfortable 76 degrees by 9:30 in the prop house this AM (while it was still below feeezing outside).
Our coldest nights at this time of year are typically clear and calm, allowing for radiational cooling.
Good news is clear conditions are also great for morning thermal gain in the greenhouse.
We’ll run it back tonight.
Old school min/max thermometer are terrific for “monitoring the situation”.