how much energy does central air use?
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Central Air-Conditioners use on average 1-kilowatt hour (kWh) per ton per hour. A 4-ton air-conditioner will use approximately 4 kWh per hour. If a four-ton air-conditioner ran for 12 of the 24 hours in a day the usage would be 48 kWh per day.
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A typical AC fan motor uses about 500 watts when it's running. Therefore, if you run the fan continuously for a 30-day month (720 hours), you would use 360,000 watt hours (720 x 500) or 360 kilowatt hours (kWh).
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An average 5,000 BTU air conditioner uses 500W of energy running at full capacity. There are 3 ways how to check how many watts does your air conditioner use: Check the specification sheet for Watts.
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The average reverse cycle air conditioner costs around $0.25 – $0.35 per hour to run for cooling purposes, depending on the size of the room. A medium sized room of 36sqm would cost $0.36 – $0.70 per hour to run. In large areas (50sqm), it will cost between $0.70 and $0.95 per hour.
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A 4-ton air-conditioner will use approximately 4 kWh per hour. If a four-ton air-conditioner ran for 12 of the 24 hours in a day the usage would be 48 kWh per day. If a customer knows the BTU rating on his air-conditioner you can calculate the tonnage. 12,000 BTU = 1 ton.
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Central Heating Furnace: 340 watts. Portable Electric Fan Heater: 2000 to 3000 watts. Central Air Conditioner: 1000 to 4000 watts.
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Converting Energy to Cents Converting BTUs to kilowatt-hours, a measurement equal to one kilowatt of power consumption per hour, you'll find that a 7,500-BTU PAC consumes about 2.2 kWh, a 10,000-BTU unit 2.9 kWh, and a 14,000-BTU unit 4.1 kWh.
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Says Abhishekh Jain, founder, Bijlibachao.com, “A 5-star rated window AC is as power efficient as a 4-star split AC. Also, look for an AC with a built-in inverter. Though more expensive, it consumes much less power.” An old 1.5 tonne AC uses around 1.5 units per hour, while an inverter AC uses only 0.91 units per hour.
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The typical standard for modern usage is 100 amps; less than 100 amps may not be adequate for your needs. Large homes, and homes with central air-conditioning or electric heat will need more power, typically 150 to 200 amps.
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Running a fan takes a lot less electricity than running an air conditioner; ceiling fans average at about 15-90 watts of energy used, and tower fans use about 100 watts. The best ceiling fans, window fans, towers and whole-house fans use only a fraction of the energy consumed by an air-conditioner.
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But rough estimates for how many watts an air conditioners uses are; Central Air Conditioner – 3500 Watts. Central A/C Fan Only – Compressor Off – 750 Watts. Largest Window Units – 1440 Watts.
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An average central ac will use 3000 to 5000 watts of power for around 9 hours a day during the hotter months.
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Evaporative coolers use both electricity and water. How much water is used depends on the humidity of the day and the fan speed that the unit is set to operate on. A portable unit might use up to 4 litres per hour while a central system could use as much as 25 litres per hour.
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A window unit AC uses 500 to 1440 watts, while a 2.5-ton central system uses about 3500 watts. That's a lot of power. A floor fan uses only 100 watts on the highest speed, and ceiling fans use only 15 to 90 watts depending on speed and size.
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The value is defined as 12,000 BTU per hour, or 3517 watts. Residential central air systems are usually from 1 to 5 tons (3 to 20 kilowatts (kW)) in capacity. So 2 tons of air conditioning would be 7034 watts.
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Split System Costs The proof of that energy efficiency lies in the power bill pudding. Split systems typically use about 9,000 BTU or 900 watts. Running for eight hours per day at the national average kWh unit cost of 13.2 cents, a ductless mini-split would cost only 95 cents per day to run, or about $28.50 per month.
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A typical whole-home air conditioner uses a 240-volt power outlet. Multiply the amps by 240 watts, which equals 4,320 watts. To find the kWh, divide by 1,000. 4,320 watts / 1,000 = 4.32 kWh.