When it gets cold (in single digits and below) the difference between the two become very apparent. With the BL I load every 8 hours and peak at about 73 degrees and upon reload end at about 70. With red oak I peak at about 70 degrees and upon reload the house is at 67 degrees. When it is cold recovering temps become much more challenging with the red oak. So why not load more often with red oak? I can't, too many coals. Everyone has a different setup with different variables. This is what I have noticed with my setup.