Share the article
What is the power consumption of my AC and how much electricity bill do I get for running my 1 Ton AC for 5 hours. If these question float in your head then you have come the right place. In this article we will see the power consumption of an air conditioner be it 1 Ton, 2 Ton, 3 Ton and also look at ways to reduce your AC power consumption and save some electricity bill.
Before we start with calculating power consumption of yourAC let’s have a quick look into various factors that increase the power consumedby an AC.
Table of Contents
Factors affecting ACpower consumption:
- No of people in the room: Human body emits lot of heat, a room with 20 people will need bigger size AC or multiple ACs to cool the air inside it, whereas the same room with 3 people in it will get the same cooling for a smaller size AC or a single AC. So more people means more power hence more electricity bill.
- Outside & inside temperature: It takes more power to cool a room when outside temperature is 40 degree Celsius than when it is 32 degree Celsius. Likewise it takes more power to cool at room to 18 degree than to cool it at 24 degree Celsius.
- Room size: Air conditioners remove the heat from the air inside your room. Therefore, larger the room, larger is the volume of air inside it and more is the electricity required to cool that air. Electricity consumed in removing heat from a 100 sqft room is less than removing heat from a 200 sqft room.
- Electrical appliances in your room: Every electrical appliance in your room generates heat which increases your room’s temperature and makes your AC do additional work for cooling the same volume of air, hence more power consumption.
- Volume of air to be cooled: Often times we keep our cupboard doors open which increases the volume of air to be cooled by your AC. Now your AC has to cool the hot air inside your cupboard too which is unnecessary and consumes extra power.
- Objects in your room: Every solid object in your room gets cold when kept in AC, this is another unnecessary cooling your AC has to do.
Calculate power consumption of an AC from it’s label:
The easiest way to calculate your AC power consumption is by using the energy saving label on your AC.
If you look into your AC energy saving label it has annualpower consumption for your AC.
Here I have pulled up energy saving label of a 1 Ton SplitAC from Blue Star.
You can clearly see on the label the annual power consumed by this 1 ton AC is 589.99 kWh. This value is calculated in test condition with annual operational hours being 1600.
Which translates to 4.5 hours of operation every day, 133.33 hours of operation every month, which I feel is average daily operation for most households.
The actual value will mostly be higher than this value because of the high outside temperature than testing conditions and our inefficient habits of using AC.
This is the most simplest and accurate method to find an AC with least power consumption.
If your AC is old and does not have energy savings label on it then you can use the below method to calculate the power consumption of your AC.
If you are shopping for a new AC visithttps://mannix.com.au/product-category/evaporative/to choose more varieties of AC.
Calculate power consumption of an AC manually:
To manually calculate your AC power consumption you willneed to know the following three things.
- The wattage of your AC – Watt is the unit of power. It means the rate at which electricity is consumed or produced by a device. For example a 50 watt electric fan consumes power at a rate of 50 watts per hour, it does not means that electric fan consumed 50 units of electricity, it means it will consume power at a rate of 50 watts every hour.
- Operational hours – Number of hours you are running your appliance, in this case air conditioner.
- Electricity tariff – Electricity tariff is the amount your electricity provider charges you for one unit (kWh) of electricity. I live in Mumbai, India here the electricity tariff is Rs 12/ kWh. Just put your areas electricity tariff in the calculator.
Ceiling Fan Power Consumption Calcu... Ceiling Fan Power Consumption Calculator & Energy Saving Tips 2022
Ceiling Fan Power Consumption Calcu...
Ceiling Fan Power Consumption Calculator & Energy Saving Tips 2022
To understand the calculated result you should understandthe following term.
- Kilowatt hour – Kilowatt hour (kWh) a.k.a units is the energy consumption of a device. For example a 50 watt electric fan running for 50 hours will consume 50 watt x 50 hours = 2500 watt hours = 2.5 kilowatt hours of electricity = 2.5 units of electricity.
As a general rule of thumb, for AC power consumption calculation you should take,
- 1 ton of cooling = 1,000 watts
- 1.5 ton of cooling = 1,500 watts
- 2 ton of cooling = 2,00 watts
- 3 ton of cooling = 3000 watts and so on.
Now use the below calculator to calculate your AC powerconsumption.
How To Interpret Calculated Result:
Whatever value you get just multiply it by two because your AC compressor is turned ON for only 50 % of the time whether you AC is conventional one or inverter AC.
So if you got 4 kWh of electricity then actual power consumption will be half of that which is 2 kWh.
The calculated result is an average value and it will go up if the outside temperature is high (like 40 degree Celsius) and inside temperature is too low (like 18 degree Celsius) and it will come down if the outside temperature is low (like 32 degree Celsius) and inside temperature is 22-24 degrees.
You will get a value which is only 5% inaccurate, but if you want to know your AC’s exact power consumption then there is a way for that too.
Calculate power consumption of an AC using Kill A Watt meter:
If you want to know exact power consumption of your AC then the most accurate way is to use a Kill A Watt meter.
Kill A Watt meter is a simple device which can be used to get accurate results on the power consumption of any device.
You can buy it from amazon using this link. Best Kill A Watt Electricity Usage Monitor
To calculate AC power consumption first connect your AC plug into the kill a watt meter and then plug the kill a watt meter in your wall socket and turn on your AC.
Then start using the AC and you can see in real time how many kWh (units) of electricity your air conditioner is using.
For appliances which have compressor like AC, refrigerator it is advisable to take the reading for 3-7 days to get exact power consumption.
So keep the AC plugged to the Kill A Watt meter for the whole week and note the final value at the end of the week this way you will get the most accurate value of your AC power consumption.
Check out this amazingly useful video from Tech Guy Charlie where he calculates power consumption of a 1.5 Ton inverter AC using Kill A Watt Meter.
Tips to reduce power consumption of AC:
- Set AC at 24 degree Celsius: Many a times we cool our room way below what is needed. Always remember idea of air conditioning is to cool your room to a comfortable temperature (22 – 26 degree Celsius) not freeze to death.
- Turn off appliances when not in use: Usually there are 5-10 appliances running in a room when the AC is running. Even the smallest of appliance dissipate heat which can heat up the cooled air quickly, so make sure you completely turn off the appliances which you don’t need and at best remove them from the room.
- Close doors & windows: AC removes heat from the air and cools it, if you open your rooms door again and again fresh stream of hot air will enter the room which needs to be cooled. Also if there are any cabinets in your room then please keep it closed otherwise the air inside the cabinet will also be cooled which is absolutely unnecessary use of electricity.
- Keep compressor & AC unit in shade: Make sure your AC does not receive direct sunlight, if it gets direct sunlight then try to avoid using that area or somehow try to avoid sunlight. Also keep the compressor unit in shade.
- Annual maintenance of air conditioner: Get your air conditioner checked every year by a professional.Refrigerant leakage, faulty compressor, low level of refrigerant can spike up the power consumption of your ac and degrade the cooling capacity. Hence you should get your AC checked at least once a year,this will surely give your AC longer life and maximum efficiency.
- Clean your AC filters: A filter full of dust acts as a barrier in the flow of air, which results in low air flow rate and makes the compressor work harder to pump fresh cool air which increases your ac electricity consumption, so keep the air filter clean.
You can read this detailed article on How to save electricity bill because of AC.
Planning to buy a new AC, check out the following list of most energy efficient AC available in 2020.
Top 5 most energy efficient AC to buy in 2020:
- Voltas 1 Ton 5 Star Inverter Split AC – Annual power consumption 617 units in a year for 1600 hours of operation. [Amazon Link]
- Blue Star 1 Ton 5 Star Inverter Split AC – Annual power consumption 599 units in a year for 1600 hours of operation. [Amazon Link]
- LG 1.5 Ton 5 Star Dual Inverter Split AC – Annual power consumption 835 units in a year for 1600 hours of operation. [Amazon Link]
- Voltas 1.5 Ton 5 Star Inverter Split AC – Annual power consumption 892 units in a year for 1600 hours of operation. [Amazon Link]
- Daikin 1.8 Ton 5 Star Wi-Fi Inverter Split AC – Annual power consumption 989 units in a year for 1600 hours of operation. [Amazon Link]
Conclusion on AC power consumption:
Most air conditioners in today’s time with energy savings stars and inverter technology compressor don’t consume much power.
1 ton air conditioner be it inverter or non-inverter consumes about 0.5 – 1 unit of electricity every hour depending on the operating conditions, which isn’t much keeping in mind the comfortable cooling experience AC’s give us especially during hot summer.
References for AC power consumption:
Share the article
Power Consumption of AC | How Much Power Does An AC Use? ›
Air conditioner usage varies based on the size of your AC. However, generally speaking, a central air conditioner will consume between 3000 and 3500 watts per hour. While window units use between 900 and 1440 watts per hour, portable units consume between 2900 and 4100.How much power does a 25 ton AC unit use? ›
Its maximum wattage at 100% output is 3,695 watts. The most energy-efficient 25 SEER 2.5-ton ac unit uses only 1,200 watts to run.How many watts does a 3.5 ton AC use? ›
Calculate your unit's wattage.
Simply multiply your unit's tonnage by 3,500 (1 ton = 3,500 watts). So, on a 3.5 ton AC, the wattage would be 12,250 (2.5 x 3,500 = 12,250).
Power Consumption Of 12,000 BTU Air Conditioners (1 Ton/3.5 kW) 12,000 BTU air conditioner units consume 991 (EER: 12.1) to 1,333 watts (EER: 9, which is a bit low for these units, by today's standards). An EER of 11.3 is average for new 12,000 BTU window units, translating to a wattage of 1,061 Watts.How many watts does a 5000 BTU AC use? ›
A window AC is in the range of 5000 BTU to 14000 BTU. The running watts required for a 5000 BTU air conditioner are around 450. An 8000 BTU air conditioner may need about 715 watts, and 1250 watts are required for a 14000 BTU air conditioner.Will a 6500 watt generator run a 3 ton AC unit? ›
No probably not for a/c or heat pump. However it would run a large window unit or a single room mini split. You need at least a 15kw (15,000 watt) minimum to run a high efficiency central a/c of 3 ton (36,000 btu), however a less efficient and or larger unit will require higher.How many watts is a 3 ton AC unit? ›
We will use a standard 3 ton AC as an example. 18 amps x 240 volts = 4,320 total watts used. Divided this by 1,000 to get your kilowatt per hour usage.Will a 7500 watt generator run my air conditioner? ›
If you want to run larger appliances such as refrigerators, air conditioners, freezers, heaters, etc. using a portable generator, then the 7,500-Watt Generator can provide the power to run those devices (not all at the same time though).Will a 1000 watt generator run an air conditioner? ›
1250 watts is all that is needed for a 14000 BTU air conditioner. With a 1000-watt generator, you can run a small to medium-sized window unit and be OK. You'll need at least a 2000-watt generator to power a large window unit. A larger generator can be a better option if you need to power many appliances at once.Will a 2000 watt generator run a window air conditioner? ›
Not only will a 2000 watt generator run an window air conditioner, but a generator of that size can also run the following home appliances. *All cannot be run at the same time, but many of these smaller appliances can be powered and run together.
What uses the most electricity in a home? ›
- Wet appliances. Washing machines, dishwashers and tumble dryers account for 14% of a typical energy bill, taking the top spot in our list. ...
- Cold appliances. ...
- Consumer electronics. ...
- Lighting. ...
How Much Electricity Does an Air Conditioner Use? Air conditioner usage varies based on the size of your AC. However, generally speaking, a central air conditioner will consume between 3000 and 3500 watts per hour. While window units use between 900 and 1440 watts per hour, portable units consume between 2900 and 4100.Does higher BTU mean more electricity? ›
One BTU is the amount of energy it takes to raise one pound of water one degree Fahrenheit. The higher the BTUs, the more power the system has.How many watts is a refrigerator? ›
The average home refrigerator uses 350-780 watts.Can a generator run a window AC unit? ›
Portable generators rated from 5,000 to 8,000 watts (W) can generally provide enough power for a window A/C and other necessities. The easiest and safest way to connect your emergency power source is to have your electrician install a manual transfer switch that controls specific circuits in your main electrical panel.How many watts is a TV? ›
How many watts does a TV use? The average TV uses 150 watts. Your devices wattage may be different depending on the brand, size, or other factors.How big of a generator do I need to run a house and AC unit? ›
Standby generators have the strength to power central air conditioners, so you can return to a cool home. A 14-kilowatt standby generator could power a 4-ton central air conditioner. A 17-kilowatt model could run a 5-ton central air conditioner.What is the minimum generator to run AC? ›
If you have a 3-ton (30-Amp, 36,000 BTUs) air conditioner, you need at least a 14 KW generator. If you have a 4-ton (40-Amp, 48,000 BTUs) air conditioner, you need at least a 17 KW generator. If you have a 5-ton (50-Amp, 60,000 BTUs) air conditioner, you need at least a 20 KW generator.How big of a generator do I need to run AC? ›
You'll need a generator between 7.5 kW and 20kW to run a 2-5 ton AC unit. Specific size generators with the power needed for AC units of these sizes are included below. The best generators to run AC units are listed below, and you can pick one for your home if you are planning a purchase.Can I run my AC on a generator? ›
Yes, please! You can plug a portable or window AC with a standard electrical cord right into a generator. No professional installation required.
How do I calculate my AC power consumption? ›
To get the energy consumption (kWh), simply multiply the appliance wattage (kW or W) by the number of hours you use. For example, if you are using a 300W air conditioner for 4 hours per day, then you are consuming about 1200Wh or 1.2kWh per day.How many watts does a central AC unit use? ›
Central air conditioners use 1,000 watts per one ton of cooling capacity. For a 2,000 square foot home with standard-height ceilings, you'll need about 3.5 tons of cooling power. This capacity of air conditioner will use about 3,500 watts per hour.Can I run my whole house on a 7500 watt generator? ›
At 9375 starting watts and 7500 running watts, this unit can handle it all in an outage – lights, refrigerator, modem/router, security system, window AC, furnace blower, TV, computer, phone charger and more.What size generator do I need for a 1500 square foot house? ›
If a home is 1500 square feet but only runs on electric, it could need 38 kilowatts-48 kilowatts worth of power from a generator. Compared to a home twice its size, 3000 square feet, if it's entirely run-on natural gas it could run on a generator that powers 20 kilowatts.Will a 2500 watt generator run a 13500 BTU air conditioner? ›
It is said that you'll need a 3,000-watt or higher generator to run a 13,500 BTU air conditioner. This is because an AC unit requires around 2,800 to 3,000 watts of power to startup, but only 1,500 to 2,000 watts to maintain the AC unit.Can I run my whole house on a 12000 watt generator? ›
Whole House: Starting at about 12,000 watts, these generators can generally keep a home running without missing a beat. You'll be able to run lights, fans, TVs, refrigerators, computers, space heaters and pretty much anything else you plug into an outlet.How big of a generator do I need to run my whole house? ›
What size is needed to power a house? Each home has different power needs. Some may need to use more appliances during a power outage while some may be enough with having just a few of them running. But in general, a generator that can provide between 5,000 and 7,500 watts would be enough to power a house.Can I run my RV AC with a 2000 watt generator? ›
To power the average RV air conditioner, the generator needs to have at least a 2000- 4000-watt capacity. There are a lot of factors involved in what size generator will work best for you, but for the most part, you will be able to use your AC and other appliances even with a 2000 watt generator.What size generator do I need to run a refrigerator and window air conditioner? ›
Depending on the AC needs in your home, a portable generator with a watt rating of 5,000- 8,000 watts may generate enough power to run your AC and even other appliances.How big of a generator do I need to run a 12000 BTU air conditioner? ›
A: Using the chart, you can see that a 2000 watt generator will power an AC up to 12,000 BTUs.
Will a 2000 watt inverter run an air conditioner? ›
For short: Will a 2000 watt generator run an air conditioner? Generally, YES, just be sure to check the actual power requirements of your AC unit and only then choose strong enough power generator.Do phone chargers use power when not in use? ›
That's wasted electricity—technically, it's called "no load mode," but in reality it's just another vampire. According to the Berkeley Lab's testing, cell phone chargers in no load mode consume around 0.26 watts, and laptop chargers, 4.42 watts.What appliances use electricity even when turned off? ›
Home office equipment such as power strips, desktop computers, monitors, printers, lamps, and anything with a digital display can use electricity even when they're turned off.Do ceiling fans use a lot of electricity? ›
Do Fans Use a Lot of Electricity? 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.Is it cheaper to run AC all day? ›
The short answer is yes, it is cheaper to leave your air conditioner on all day. But this does not mean that you should leave it on full blast, keeping your home so cold that you need a sweater or jacket to be comfortable.Is it cheaper to run a window air conditioner or central air? ›
Our Verdict on Window Air Conditioners vs Central Air Conditioners. It all comes down to use and how much you're willing to invest in your HVAC system. For several rooms or even a whole building, it's cheaper and more efficient to go for a central air conditioner. For a single room, a window unit is just fine.Does leaving the AC on save electricity? ›
The answer to the question “is it cheaper to leave your air conditioner on all day?” is a resounding yes. You'll save money on your energy and repair bills, especially during the summer months.How big of a room will 8000 BTU cool? ›
As a guide, consider 5,000-BTU models for rooms 150 square feet or smaller, 8,000 BTUs for medium-size rooms (340 square feet), and 12,000 to 14,000-BTU models for rooms with square footage from 550 to 800. Having the correct power is imperative.Should I get 6000 or 8000 BTU? ›
Recommended BTU By Room Size
If your room is 10'x 20' (200 square feet), you'd need to look at a 6,000 BTU unit. Once you get into 340 and 400 square feet per room, you'd need an 8,000 or 9,000 BTU air conditioner, respectively.
Can a 2000 watt generator run a refrigerator? ›
Unless you're powering a tiny home or RV, you won't be able to run all the electrical appliances you would use on a typical day with a 2,000-watt generator.How many watts is a microwave? ›
Key Takeaways About Microwave Wattage
Small or compact microwaves used in hotel rooms consume around 600-800 watts. Standard microwaves that we use in our homes consume 800 to 1000 watts. Commercial microwaves are large microwaves usually found in restaurants that consume 1000+ watts.
Watts For A TV Vary By Screen Size And Type.
|Energy Comparison||24-inch TV||50-inch TV|
|LED||24 – 28 watts per hour||50 – 60 watts per hour|
|LCD||36 – 44 watts||75 – 90 watts|
Conventional generators use a mechanical alternator to produce alternating current (or AC) power that's ready to use. Inverter generators also use an alternator to produce AC power, but this current is converted into direct current (or DC), before a microprocessor inverts it back into cleaner AC power.Can a generator damage an AC? ›
One of the biggest problems most people face while searching for generators is that they don't know that the size and age of the generator can impact its efficiency and even damage the HVAC system!What can a 2000 watt generator run at once? ›
Generally, 2000 watts is enough to power a 500-watt deep freezer and one element of the electric stove, or a freezer, together with a 650-watt microwave (using 1000 watts) and a few lights - these home, camping and caravanning applications are outlined further below.How many watts does a dryer use? ›
On average and across all loads and cycle configurations, electric clothes dryers may use anywhere from 1800 to 5000 watts of energy. That translates to somewhere in the range of 1.8 to 5 kWh of electricity.How many watts does Wi-Fi use? ›
How much electricity does a Wi-Fi router use? Generally, Wi-Fi routers use between 5 and 20 watts (W) of electricity, depending on the model. Most Wi-Fi routers use about 2 amps, connect to a 120 volt outlet, and pull somewhere around 5 to 7 volts.How many watts does a cell phone charger use? ›
How much electricity does a phone charger use? Generally, phone chargers use about 5 watts (W) of electricity. Some faster chargers can use up to 20 W, but the majority of standard chargers are more around the 5 W range. Phone chargers usually use one to two amps, and connect to a 120-volt outlet .How big is a 25 ton AC unit? ›
|Length (base)||154″ (12' 10”)|
|Width||101 1/2″ (8' 5.5″)|
|Height||64 1/2″ (5' 4.5″)|
|Unit Weight||4,600 lbs.|
How much does a 25 ton air conditioner weigh? ›
|Shipping Weight||2,700 lbs|
One ton is equal to 12,000 BTUs. This is the amount of heat necessary to melt one ton of ice—and that's where the name “ton” comes from. So a 25 ton air conditioner is a unit that removes 300,000 BTUs from a space per an hour.How big is a 20 ton AC unit? ›
|Weights and Dimensions|
|Operating Weight (lbs)||1125|
|Exterior Dimensions (D) (inches)||86.380000|
|Exterior Dimensions (W) (inches)||67.380000|
|Exterior Dimensions (H) (inches)||50.380000|
On average you need 1 ton of cooling for every 1000 square feet of home.How many square feet does a 2 ton AC unit cover? ›
|ZONE 1||ZONE 2|
|1.5 Tons||600 - 900 sf||600 - 950 sf|
|2 Tons||901 - 1200 sf||951 - 1250 sf|
|2.5 Tons||1201 - 1500 sf||1251 - 1550 sf|
|3 Tons||1501 - 1800 sf||1501 - 1850 sf|
The unit weighs approximately 3100 lbs.How much does a 40 ton air conditioner weigh? ›
Unit Weight (N7)
30 Ton Air-cooled Chiller (Portable)
The unit weighs approximately 1700 lbs. in total with dimensions of 80” L x 88” W x 73” H.
Air conditioners that are too big consume more energy, endure more wear and tear, and simply don't work as well or as long as an appropriately sized unit. This can cause higher utility bills, more repairs, and discomfort in your home.How many sq ft will a 3 ton AC cool? ›
Will a bigger AC unit cool my house better? ›
An “oversized” air conditioner will cool your house quicker, but it will use more electricity and will not remove humidity adequately. Contrary to popular belief – and intuition – long AC system run cycles are far more desirable and energy efficient than short-run cycles.How many ton AC do I need for 2400 sq ft? ›
A 2,400-square-foot home would need a four-ton unit. Again, there are 2.5-ton and 3.5-ton units in case your square footage doesn't work out perfectly for a two- or three-ton unit, for instance.What size AC unit do I need for a 2200 sq ft house? ›
For example, a 2,200 sq. ft. house divided by 600 = 3.6666. So you would want to install a 3.5 ton unit.Is 3-ton AC too big? ›
While a local HVAC professional can help you with this, the general rule of thumb is that one ton of AC capacity will cool approximately 500 square feet. So if your home is 1,500 square feet, a two to three-ton unit would be best.