Let me be more descriptive.
-25 day time high during a four day blizzard in the city of Calgary
Four burner stove with each burner turned down as far as possible.
nothing flammable within 2 feet of the stove
A Kipor 2800 generator was used for 5 hours (3 in the evening and 2 in the morning) and furnace run during that time.
A heating pad run by a MSW 200 watt inverter with copious blankets.
I was at a convention during the day from 8 am until 8 pm. The stove burners were not run when I was inside the RV. The furnace was set as low as possible when I was not "home".
I will not sleep with a generator running.