Home Air Conditioner Power Consumption of 1 , 1.5 & 2 Ton ACs [ Complete information ]

Power Consumption of 1 , 1.5 & 2 Ton ACs [ Complete information ]

by ranjbuy


Owing to the increasing temperatures in the wake of global warming and other climate changes issues, summers are getting more unbearable. Often, the households look out for the best resorts to protect themselves and keep up the internal environment ambient. What’s the best choice existing than an air conditioner, popularly called as AC?

When it comes to the ACs, the buyers are very conscious before making any investment. They would go for the models that not only function perfectly but also give moderate consumption on utility bills. In other terms, they look for options that impact power, and electricity consumption.

Best 5 Star Air Conditioners in India with low Energy Consumption

Best 3 Star Air Conditioners in India

Therefore, in today’s blog, we would be discussing in detail the power consumption in 1, 1.5, and 2-ton ACs. (More precisely, 1-ton inverter AC power Consumption per hour).

The factors affecting

Before entering into the calculations, it is important to understand the factors that affect the overall power consumption. Thus, refer to the list given below:

  • Size of the room : Room sizes define the volume of hot air that needs to be removed by the AC. Though different models have the same wattage and tonnage, they would not function the same way in different room sizes. The bigger the room size, the greater would be the electricity consumption to maintain the ambient conditions. Thus, a 1-ton AC of the same wattage would show different values in room sizes of 100 sq. ft and 200 sq. ft respectively.

Best Air Conditioner in India for Small or Medium Size Rooms [ Bachelors ]

  • The number of people : Greater the number of people in the room, higher would be the sources emitting hot air. Therefore, the cooling effect would also vary, and power consumption would get affected accordingly.
  • Location of the household : The location of the household majorly defines the wattage or tonnage of AC fitting into the same. In areas of high temperature, power consumption highly depends on the temperature difference between the external and comfortable ones. But, in the case of humid areas, the major role is to remove the excessive moisture. This comes down to the size of the compressor and time of running the same (thus defines the role of tonnage).
  • Colors in the room : This is an under-rated factor and often ignored by the people. Basic science states that dark colors absorb heat and keep up the temperatures around them higher. Thus, a higher number of objects or surfaces with dark colors in the room is surely going to affect the AC’s capability in cooling up space. 
  • Electrical appliances in the room : Even the other appliances within the room impact the overall capacity of an AC in cooling down the internals. All of these emit heat after some duration of continuous operation. For example, a greater number of lights in the room increase the cooling power of an AC. 

Therefore, if you are very conscious of keeping up the utility bills under control, then learn to play with all of these factors. Just remove the assumption that buying a higher tonnage or BEE ratings of the AC model would sort out the problem automatically.

Best Inverter AC in India to Buy online for Office Use

Best 1.5 Ton AC in India from Leading Brands like LG, Samsung, Daikin

Top Selling 2 TON AC India

Getting further technical

Along with these basic factors, you would also need to look out at the technical details offered by the appliances. Thus, to judge on the question of ‘how many watts consumed by 1-Ton AC’, look out for the parameters given below (source can either be the technical book given in the packaging or respective website of the manufacturer):

  • Cooling capacity- The cooling Capacity of an AC is defined by the amount of heat energy removed from any room and is given in the units of BTU/hour (British Thermal Units). The value given in it defines the amount of heat energy required to raise the temperature of 1 pound of water by 1 degree Fahrenheit. 

For example, 1 Ton= 12000 BTU/hr, and 1 BTU= 1055 J. Therefore, cooling capacity= (12000*1055)/3600 J/s= 3516 W= 3.516 kW.

Therefore, cooling capacity is defined by the tonnage of the AC.

  • Energy Efficiency Ratio- Energy Efficiency Ratio, popularly called EER, defines the utilization of input power to cool down the room where the AC is set up. By formula,

EER= (Cooling Capacity)/ (Input Power)

Refer to the standard chart prepared by BEE on this parameter, and you would get the relation between star ratings and the EER values (both minimum and maximum). 

  • Indian Seasonal Energy Efficiency Ratio- Keeping in mind the fluctuating temperature profiles, ISEER was defined for Indian Standards. It gives a clear picture of the adaptability of an AC to the differing outside conditions. 

By formula, ISEER= Cooling capacity/ Annual power consumed

Based on this, the chart is created for showing up the values corresponding to any star rating. (With the assumption of 1600 hours of annual operation of the AC). 

Looking up the product label

If you look at the product label, you are sure to find the values of annual power consumption, and can accordingly use the same to calculate the above values. Therefore, you would get an approximate value on the power consumption of your AC unit (consider inaccuracy of about 5-10%, owing to the different external temperatures). 

Also, there is a good number of websites, that have an in-built calculator to aid in understanding the power consumption. Refer to any of these to save up some time on the manual calculations.

On an ending note, consider all of these factors properly to judge the true power consumption values of the AC unit that you are looking out for. Let us know of your concerns in the comments section.

Till then, happy reading, and stay safe with your loved ones.

You may also like

Leave a Comment