That’s a good question. If you spend a lot of time in your basement, you should set the thermostat at 20°C (68°F) or less during the day and in the evening, and at 17°C (63°F) or less at night or when you are absent.
If your unfinished basement is unoccupied, you can set the temperature at 15°C (59°F) to maximize your savings. Keeping the door to the basement closed will help reduce your heating costs without affecting your comfort.
Finally, we suggest that you get in touch with your insurance company and find out the specifics of your policy to avoid any unpleasant surprises.