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And there's a lots more than just old refrigerators...Kids going to collage, or leaving home, replacing some older or not so old appliance(s) )that you may not even had consider to be energy hogs)
It's colder than heck there in the winter. I'm sure chas and brook can back me up on this :-)
Now I think Brooke mentioned almost moving to Canada at one point, but I'm sure Chas thinks everything below 50 degrees is cold.
Didn't mean to offend and I was in a hurry,so sorry! There is just so many more variables to look at and consider. I have no doubt the HS spa is efficient but not much more than a lot of other quality spas out there.
I would like to use a data logger to record ambient temperature, water temperature, and energy consumption, then use this data to calculate actual heat loss. I have access to this equipment at my job, but I don't think they would appreciate it if I borrowed the stuff for 12 months.