Much less than the figure obtained by my "rule of thumb" of dividing HDD by three. Downstairs thermostats set at 48 and 45; upstairs "off." Reading upstairs was at 45 nonetheless.
14 ccf from noon to noon.
Still cold in Cincinnati. It's 9 now, 5:50 am Saturday.
Let the faucet in the kitchen drip a little. Opened up the doors to the pipes under the sink, to allow the indoor heat to get into the cabinet.