We upgraded our A/C to a 15 SEER unit at the start of this summer. The graph shows temperatures and our energy usage for the last two years. Note first the close anticorrelation between temperature and energy use in the winter and the close correlation in the summer. This summer, with the new A/C, our energy use dropped by an average of about 300 kW-hours per month, from over 1500 kW-hours to about 1150 kW-hours.

The light blue bars show our energy use this year.  Our new A/C was installed at the start of this summer.
The light blue bars show our energy use this year. Our new A/C was installed at the start of this summer.

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JC

Planetary Scientist and Asst. Professor of Physics at University of Central Florida; Movie Buff; Trekkie; Jethro Tull fanatic; part-time actor, piano player, writer; and full-time husband and father.

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