With all the factors that affect the temperature inside my house, I've decided I'm going to use the scientific method and collect as much data this season as possible to determine the ideal internal conditions needed to maximize heat flow throughout my house. by the way, I know absolutely nothing about thermal dynamics and I'm not even sure "Heat Flow" is the proper term I should be using. I have a ceiling fan in just about room in my house, and I put in a setback thermostat last year. I've always questioned the best way to run the fans in each room to help move the air around... so I guess that's the big question I'm hoping to answer (my house has a very open layout). So... I've setup a google doc spreadsheet and I'm going to start recording fan settings and resulting temperatures. I figured I'd post what I'm thinking here, so see what others think. Data I'm preparing to capture: Date Time Pellet Brand Outside Temperature Living Room Temp (Stove is here) Thermostat "Away" Temperature (daytime) Thermostat "Sleep" Temperature (night) Kitchen Temperature (One room away from stove) Family Room Temperature (Two rooms away from stove) Upstairs Temperature Fan direction (up or down... one entry for each fan) Fan speed (high, med, low... one entry for each fan) I'm planning on collecting temperatures with existing fan settings for 1-2 weeks, then adjusting one fan (either speed or direction) and collect temperatures for another 1-2 weeks, then changing another setting, etc. The biggest hurdle is all the permutations that are possible with the fans... that it could take more than one season to collect them all. What I'll probably do is make drastic fan setting changes and see how that affects the temperature... then try to hone in on the "optimal" setting from there. But, I'm still kind of thinking out loud. Anyone have any thoughts, other data I should collect, or different approaches you think I should take?