Why do air conditioners and refrigerators have to keep turning on and off to keep the air within a temperature range, instead of adjusting their output to maintain an exact temperature?
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There ARE variable AC units. They just cost a lot more. More common are two-stage units: ones that can do full blast when needed but do half-blast when only a little cooling is required. Fully variable speed are really nice, because they help you sleep better — no big swings in temperature throughout the night. But, again, they cost more and most people don’t bother spending the $$, since new HVAC systems are already an arm and a leg
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