How much of a difference does the temperature set on an air conditioner effect the amount of energy used?
My mother got very upset with me after I had set the temperature on the air conditioner to 68. She usually keeps it at 74 degrees while everyone in the house other than her melts. She yelled about the difference in cost between the two settings and I'm curious about how accurate she is.
Tremendously. Demanding a lower temperature of the house implies a greater temperature gradient to drive heat infiltration. Also, the refrigeration cycle works with worse performance the more dissimilar the temperature of the indoor heat exchanger compared to the outdoor heat exchanger.
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