I live alone in a small apartment. My electric bill is usually a lot $20/month. After I got AC installed it doubled and even tripled in some summer months. I’m trying to preserve it by turning it off when I’m not home.
Why is a small window unit so big on energy use?
In:
Window units are actually terribly inefficient. Because they are classified as an appliance the energy efficiency requirements are considerably less strict than with residential hvac systems. Additionally your apartment is presumably older and therefore not well insulated this adds a great deal of thermal load to the space. In general the best option is to leave the system on all the time. Turning the unit off causes the humidity to rise and the structure and its contents to increase in temperature.
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