
While purchasing an air conditioner, it is not only important to choose a brand and a price point, but it is also crucial to select the right tonnage of the air conditioner according to the room size. If you select an air conditioner of low tonnage, it will not be able to cool your room properly, and if you select a high-tonnage air conditioner, you may end up paying a high amount of electricity bills. The tonnage of an air conditioner helps you select a suitable air conditioner for your room to cool it properly in summer.
AC tonnage is defined as the ability of an air conditioner to cool. It is not defined as weight. One ton of an air conditioner has the ability to remove 12,000 BTUs of heat from a given space every hour. It is important to choose an air conditioner with a higher tonnage so that it is able to cool a larger space.
Room Size (Sq. Ft.) |
Recommended AC Tonnage |
Up to 120 sq ft |
1 Ton AC |
120 – 180 sq ft |
1.5 Ton AC |
180 – 250 sq ft |
2 Ton AC |
250 – 400 sq ft |
2.5 Ton AC |
Besides the size of the room, there are various factors that determine the tonnage of the AC. These factors include the height of the room’s ceiling, the number of windows in the room, the level of sunlight in the room, and the number of people in the room. A room with more sunlight and windows may require more tonnage. There may be insulation and electronic devices in the room that generate more heat.

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If the wrong AC size is chosen, it may affect comfort and electricity consumption. If a small AC is chosen, it would operate continuously without cooling the room properly. If a larger AC is chosen, it would cool the room fast but would not remove humidity.
It is important to be mindful of the exact size of your room before buying an air conditioner, but there are other factors as well to consider, such as sunlight, windows, and the height of the ceiling. Inverter air conditioners are also an alternative to adjust the capacity of air conditioners according to the prevailing conditions of the rooms.

A 1.5-ton air conditioner is generally enough to cool bedrooms measuring between 120 and 180 sq feet. It provides an equal balance between cooling and consumption. If there is direct sunlight or a high ceiling, it is necessary to use an air conditioner with more tonnage.
Image credits: Freepik
ALSO READ- 1 Ton vs 1.5 Ton AC: What’s The Difference And Which Cools Better In Summer?
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