Around 1.5 units per hour, provided the compressor is on.But that is a rough estimate, your actual power consumption varies every single second. Let's dive in a little deeper and see how these things relate to each other.If you carefully look at your air conditioning unit, you'll probably see a label like this : The power rating printed on such a label is when the AC is under a stable load, the current is constant, the compressor is working, there's no back emf being produced int the induction coils., and above all the supply voltage is exactly equal to 230 volts at 50 Hz.In this stable state, the AC unit is consuming 1.5 units of electricity per hour. That said, not always is the compressor running. If you AC has a thermostat and a temperature setting, once the ambient room temperature reaches to the set limit, the compressor shuts off and only the circulating fans work.In this case the power consumption is almost equal to a ceiling fan, with my test bench, I got readings around 0.3 amps at 230 volts.

That is equal to 0.06 units per hour, almost equal to a 80 watt incandescent bulb.Another test I conducted : Under extreme load, at a room temperature of about 32 degree Celsius, the power consumption rose to almost 1.8 units per hour, or 1800 watts.   How do you calculate your power consumption : The commercial unit of electricity is kWh, also called as BTU (Board of trade Unit), which equals to one kilowatt load used for 1 hour.Units = Power in Watts * time in seconds / 3600000Units = Power in Watts * time in hours / 1000Units = Power in kilo Watts * time in hoursYou can guess the power consumption by these steps : For while the compressor is working :For while the circulating fan is working : Try this for the average time you use your air conditioner in a day, and add the two to get the daily units consumption. Multiply this with the cost of 1 unit of electricity (around Rs. 6) and you'll get the bill for a single day. Multiply by 30 to get the monthly expenditure.I use my AC unit for around 14 hours a day, at 24 degree Celsius.During the 14 hours cycle, my compressor works for about 4 hours, while for the rest 10  hours, only the fan works.

Consumption Part 1  : 1500 * 4 /1000 = 6 unitsConsumption Part 2 : 80* 10 /1000 = 0.8 unitsTotal Consumption   :                     =  6.8 unitsBill for a single day  :                      = 6.8 * 6 = 40.8Bill for a month        :                      = 40.8 * 30 = Rs. 1224But the fact is, that never do you get the exact 230 V supply, nor does the operating conditions remain the same, so for the projected output, add a uncertainty factor of 20 % positive, and the value will be quite close to the actual consumption.Keep in mind that this varies from AC to AC, and to get a fairly accurate reading is almost impossible. Do you know what size your air conditioner is? In the world of building science, you'll hear a lot of talk about why oversized air conditioners are a bad idea. Briefly, they may not dehumidify as well, short-cycling wears them out quicker, and your home will probably be less comfortable if the air conditioner is too big.

But to know if your AC is oversized, first you have to know what size it is. (Note: This article is about finding the size of your existing AC, not determining what size you need.) Look for the label The good news is that most HVAC manufacturers make it easy to determine the nominal capacity of your air conditioner. It's in the model number. Go outside and find the outdoor unit, that metal noisemaker hidden away on the side or the back of the house. central air conditioning units mobile homesIt'll look something like the one you see above, although maybe not quite so decrepit as that one. what is a 2 ton ac unitThen find the lable that gives the data about your AC. air conditioner outside unit runningIt'll look like the image below.

Up near the top of the label, you see the model number (M/N) and serial number (S/N). The model number is where you can find the number you're looking for. Not all manufacturers do this, but most will give you a 2 or 3 digit section that tells you how many thousands of BTU/hour your air conditioner can move out of your home. The first section in the model number gives you info about the type and efficiency of the unit you're looking at. In the case of this Lennox model (which, by the way, is not from the outdoor unit shown at the top of this article), the 13HPX tells you it's a heat pump with an efficiency rating of 13 SEER. The digits you need Just past that string of 5 characters, though, is the part that tells you the nominal size: 048. That means the air conditioner—or heat pump in cooling mode in this case—has a nominal capacity of 48,000 BTU/hour. I say nominal because the actual capacity is almost certainly going to be different. The numbers you'll see on residential air conditioners and heat pumps are:

The 3 digits in the model number tell you the nominal capacity in thousands of BTU/hr. Since each 12,000 BTU/hr is equivalent to 1 ton of air conditioner capacity, it's easy to figure out how many tons of nominal capacity your AC has. Why Is Air Conditioner Capacity Measured in Tons? 3 Reasons Your 3 Ton Air Conditioner Isn't Really 3 Tons Why an Oversized Air Conditioner Is a Bad Idea Fraser-Johnston® Heating & Air Conditioning home comfort systems are designed and built to provide maximum quality, comfort, and efficiency to your home. Whether you're looking for a furnace, an air conditioner or a complete heating and cooling solution , your Fraser-Johnston® Dealer can evaluate factors such as your home's size, age, number of rooms, regional climate, and utility costs to select the best system for your home. professionalism through North American TechnicianNATE is the leading certification program for technicians in the heating, ventilation, air-conditioning and refrigeration (HVAC/R)

industry, and is the only test supported by the entire ENERGY STAREarning the ENERGY STAR® means products meet strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the Department of Energy. standard models, ENERGY STAR® products are between 15 and 25% more efficient. This model meets ENERGY STAR® requirements for energy efficiency. Fraser-Johnston Heating & Air-Conditioning DETAILSZX 04-14 ReliaCore 2003 - 12.5 Tons

3-5 Tons
13 SEER
11 EER

6-12.5 Tons
10.8-11.2 EER
11.0-12.1 IEER

7.5-12.5 Tons
12.75-14.8 IEER w/ IntelliSpeed

DETAILSZY 04-14 ReliaCore 2003 - 10 Tons

3-5 Tons
15.0-15.4 SEER
12 EER

6-10 Tons
11.5-12.2 EER
11.6-12.6 IEER

7.5-10 Tons
14.0-14.4 IEER w/ IntelliSpeed

DETAILSZQ 04-06 14 SEER ReliaCore2003-5 Tons14 SEER/12 EER DETAILSZV A3-A5 ReliaCore 3003-5 Ton15.95-17.5 SEER
13.05-14.0 EER DETAILSZK A3-A5 ReliaCore 300 MagnaDRY3-5 Tons

14.25-14.7 SEER
12.1-12.2 EER

DETAILSZW A3-A5 ReliaCore 3003-5 Tons14.5-15 SEER
12.2 EER DETAILSZU A3-A5 ReliaCore 3003-5 Tons14 SEER
11.8 EER DETAILSDW -15 to -25 Packaged Unit180 - 300 MBH10.5 to 12.0 EER / 80% SSE DETAILSDL -15 to -25 Packaged Unit 180 to 300 Mbh8.5 EER / 80% SSE DETAILSDU -15 to -25 Packaged Unit 180 to 300 Mbh9.7 to 10.0 EER / 80% SSE DETAILSWW -15 to -25 Packaged Unit180 to 300 Mbh10.4 to 12.3 EER / 80% SSE DETAILSZW 15-25 ReliaPlus 100180 to 300 Mbh

10.6-12.2 EER

11.0-13.4 IEER w/ CV

12.1-14.0 IEER w/ Intellispeed

11.0-13.4 IEER w/ VAV

DETAILSDK -15 to -25 MagnaDRY Packaged Unit180 to 300 Mbh9.7 to 11.0 EER / 80% SSE DETAILSWK -15 to -25 MagnaDRY Packaged Unit180 to 300 Mbh10.0 to 11.9 EER / 80% SSE

DETAILSZS 15-25 ReliaPlus 10015-25 Tons

10.0-11.0 EER

10.5-12.1 IEER w/ CV

11.1-13.2 IEER w/ Intellispeed

10.5-12.1 IEER w/ VAV

DETAILSZK 15-25 ReliaPlus 100 MagnaDRY Reheat15-25 Tons

10.0-11.2 EER

10.3-12.2 IEER w/ CV

12.1-13.2 IEER w/ Intellispeed

10.3-12.2 IEER w/ VAV

DETAILSDK -07 to -12 MagnaDRY Packaged Unit90 to 150 Mbh11.1 to 11.2 EER / 80% SSE DETAILSZK 06-12 ReliaCore 300 MagnaDRY6.5-12.5 Tons

11.0-11.2 EER

11.4-12.5 IEER w/ CV

12.0-14.0 IEER w/ Intellispeed

11.4-12.5 IEER w/ VAV

DETAILSZU 06-12 ReliaCore 3006.5-12.5 Tons

11.5-11.7 EER

12.0-12.9 IEER w/ CV

12.0-12.9 IEER w/ VAV

DETAILSDW -12 Packaged Unit150 Mbh11.35 EER / 80% SSE DETAILSDL -06 to -12 Packaged Unit 77 to 140 Mbh9.0 to 9.3 EER / 80% SSE

DETAILSDU -06 to -12 Packaged Unit 75 - 146 MBH10.0 to 11.5 EER / 80% SSE DETAILSDS -06 to -10 Packaged Unit75 - 120 MBH10.4 to 10.5 EER / 80% SSE DETAILSZW 06-12 ReliaCore 300 6.5-12.5 Tons

12.0-12.2 EER

12.7-14.0 IEER w/ CV

13.8-14.5 IEER w/ Intellispeed

12.7-14.0 IEER w/ VAV

DETAILSZS 06-12 ReliaCore 3006.5-12.5 Tons

11.0-11.2 EER

12.1-12.5 IEER w/ CV

13.0-14.0 IEER w/ Intellispeed

12.1-12.5 IEER w/ VAV

DETAILSZS 03-05 and A6 ReliaCore 1003-6 Tons

3-5 Ton Units
10.8-11.0 EER
13.0 SEER

6 Ton Units
11.0-11.2 EER
11.3 IEER

DETAILSZD 03-05 ReliaCore 1003 - 6 Tons11.8-12.0 EER
14.0 SEER DETAILSDW 3 - 5 TONS36 - 60 MBH13.0 to 13.5 SEER / 11.0 to 11.8 EER / 80% AFUE DETAILSZK 03-05 ReliaCore 100 MagnaDRY3-513.0 SEER
11.2 EER DETAILSDG -03 to -05 Packaged Unit36 - 60 MBH14.0 SEER / 11.6 to 12.0 EER / 80% AFUE