I have my newly installed nc30 in the basement and cranked last night. I was trying to figure out last night which vents in my 1st floor would be heat vents and which ones would be cold air returns. My first floor consists on a living room, dining room and kitchen. Each room has 1 vent and the basement door is open to the kitchen. The thing that interested me was that the only place the hot air seemed to be rising was up the basement stairwell (which is on the opposite end of my basement) up into the kitchen. All of the vents had cold air going down (tested with a lighter). Even the vent right next to the stove seemed to be pulling cold air down opposed to letting heat rise (surprising to me). So will the heat rising up the stairwell and cold air going down a vent in each room be adequate to circulate the basement heat on my first floor?