We have been in single digits w/ no wind. The Lancaster is on a tstat and set on 3. (100% corn). I have 1600 sqft and hardly ever have to go up to 4. We dont typically get the brutal cold here in central OH. I dont think I have run it on 5 w/ corn.Temps are starting to drop here, just loaded up 25 bushels of corn in the hopper attached to the house and made sure all the temp sensors are working across the property. Ready as I will ever be.
Anytime it gets under 10 degree's (or 15 with a wind) the ole Auburn is steady at heat setting 4 of 5. 5 just scares me just a bit on how hot she gets. Also does not seem to put out that much more heat at 5 than it does at 4.