Hello, I'm engineering a heat-pump for my senior project. My professor is out of town and these questions have been on my mind. I'm trying to calculate ACTUAL heat loss through the tent walls and ceiling. I'm using a tent 10ft x 5ft x 6ft. I'm trying to heat it with approx. 750 btus/hr There is one person inside I'm running calcs for heat transfer through thin nylon (k=.25 in SI) and am coming up with some incredible numbers. I then realized this is more of a natural and forced convection problem.... I know a temperature gradient forms due to lack of any real air movement and therefore wont transfer the approx 95000 watts/hr the nylon will transfer. How do I PROPERLY approach this problem?