The plot above shows a sawtooth pattern when the heater is kicking on and off. You can see the night when my heater came on 12 different times over a 9 hour period. The following two nights the temperature gradually decreased, but never low enough to trigger the heater.
I should state, that I am still not finished with the greenhouse. The soffits are still open, so I have simply stuffed a couple towels in the gaping holes to keep air from leaking out of the eaves for the time being. I should get the soffits attached later this week.
Also, I just finished the trim around the door and put weather stripping in place on Monday, which probably helped the greenhouse stay warmer over the last two nights.
I still haven’t had a big test with a freeze outside, but I feel pretty confident now that with the soffits in place, my heater will keep the interior right around 60 degrees, which will make my plants very happy.
Stay tuned for pictures of my finishing touches and the plants in place!
See other phases of the project here: