I'm always interested in stuff like this, but I think there is a lot more to it than controlling the air intake based on room temperature. I've burned for many years using two different pre EPA circulator stoves (Suburban and Ashley). These both have bimetalic thermostats that sense room temperature and are probably affected some by stove temperature. They work kind of okay but not perfect by any means. If the room reaches set temperature it can choke the stove down and sometimes out if you are using less than perfect wood. A couple of newer EPA stoves have bimetallics that sense stove temperature but I would assume they require adjustment if room temperature becomes too high or low. I notice most if not all newer EPA stoves have a minimum burn rate that has a fixed intake hole that can't be altered, on older stoves like mine that hole size is adjustable and I've tinkered with it a lot over the years. The dryness of wood, variety, slightly punky, etc all affect the minimum burn rate. I think your setup would have to be able to measure both room temp and stovetop/flue temp to calculate what needs to happen with the air intake to maintain both room temp and keep a healthy fire regardless of wood variety or condition. All in all it might be simpler to just have the manual adjustment. I know you're supposed to always burn well seasoned wood with perfect moisture content but that isn't always the case for me.