I have 3 thermometers around the shop with one at the lid and the other 2 in opposite corners with the wall stat 4ft high in another corner. Both wall thermometers are always within 2 degrees of what the wall stat is (cheap 120V Honeywell) and the one at the lid usually runs about 4 degrees over, no ceiling fans. I really can't tell the difference on the woodpile if the shop floor is calling or not, burn seems to be the same day to day. Now if I turn on the unit heater, different story. That'd get rid of half a cord in a week too probably if I ran it all the time and kept it at 66. I leave the shop at 55 via the floor, and it's sweaty in a T-shirt when working. Unit heater is for when I wanna melt something off quick or sit around and drink beer, but even then 65 will cook me right outta there