Quick question. With a forced air system in a home with a main level and an unfinished basement, but one that does have supply runs and registers installed, should the basement supply run air registers be left open or shut during the winter?
My father-in-law says shut since you don't want to heat space that you aren't currently living in. My father says open them because it will make the upstairs feel warmer as the heat that is poured into the basement rises. Both seem to make sense. I don't want to waste energy, but I also want the most comfortable solution. Right now, they are closed and I think my floors feel cool.
Any thoughts or suggestions? Thanks for the advice.