The daily Heating Degree Days here (base 68F) are still pretty mild, as shown by this graph from the closest monitoring station that is 1 mi. away:
I do not heat my whole house, only the room(s) I am active in.
And although I have
improved the insulation in my kitchen, as I write this, I am only heating the living room to 68 degrees F (20 C).
My little 9k mini-split is barely ticking over... hardly enough to keep my
NO_MOVING_PARTS_TOWEL_DRYER going.
[* EDIT: I just got a call from my hyper-horticultural girlfriend, alerting me to the certainty of hard freeze tonight and tomorrow, so my HDD chart is gonna look different pretty soon. *]
Cheers from soggy (for now) Portland, OR
-AC