Tv dropped to 53F while Tl=54, Tk=55.  To was low, will check logs.  To got down to 20F at 6am.  Average can be calculated from the logs which now provide a sample every two hours.

Burn started 10:25am.  After 1 hour Tv=63F (+10F).  Will burn for another 30 minutes.

Ended burn at 11:35am at ~64F.  No point in going higher since electric can't sustain it.