I went back to bed and just now got up. I feel good mentally and physically. It is a moderate 66 degrees outside this morning and a warm 77 degrees inside; we never bothered to cool the home yesterday as it was mild but our home was warm and kept it's warmth after mom cooked dinner. Our home maintains it's temperature because of the spring running below our home. The water table is so close that it keeps us from freezing in the winter and overheating in the summer. Whatever the ground below our home is that is going to be where our home stays; it is as close to having an underground home.
This home is easy to warm and cool. The first year we lived in our home the cost of keeping it warm was $87.00 (late 1970's).