The daily cost to run a residential central air conditioner for 12 hours typically ranges from $2.50 to over $10.00, depending heavily on the unit's tonnage capacity, SEER energy efficiency rating, local electricity utility rates (measured in cents per kilowatt-hour), outdoor ambient temperatures, and home insulation quality. High-efficiency variable-speed inverter systems (like Carrier Infinity) consume significantly less electricity during partial-load runs compared to older single-stage systems operating continuously.
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