How to Find the Perfect Cooler Size for Your Room?

Hot and stuffy rooms can be uncomfortable and unpleasant, especially during warm weather or in poorly ventilated spaces. The lack of airflow and high temperatures can lead to feelings of suffocation, difficulty breathing, and excessive sweating, making it challenging to relax or concentrate. 

Air coolers play a crucial role in alleviating the discomfort of hot and stuffy rooms by providing a steady stream of cool and fresh air. Unlike air conditioners, which recirculate the same air, air coolers use the natural evaporation process to cool the air, adding moisture and freshness to the environment. This not only lowers the temperature but also helps improve air quality by filtering out dust and allergens, creating a more comfortable and healthier indoor atmosphere.

Choosing the right size air cooler ensures optimal performance and efficiency. An air cooler that is too small for the space will struggle to effectively cool the room, leading to inadequate cooling and increased energy consumption. Conversely, an oversized air cooler may consume more energy than necessary, creating excessive humidity levels. By selecting the appropriate size based on the room's dimensions and airflow requirements, users can maximise the cooling efficiency of their air cooler while minimising energy costs and environmental impact. In the following air cooler size guide, users will learn more about how to choose the right size air cooler according to their requirements.

Understanding Air Coolers 

Air coolers, also known as evaporative coolers or swamp coolers, work on the principle of evaporation to cool the air. They consist of a fan, a water reservoir, and a set of cooling pads or filters. The fan draws warm air from the surrounding environment and passes it through the wet cooling pads. As the air moves through the pads, water evaporates, absorbing heat from the air and lowering its temperature. The cooler, moistened air is then circulated back into the room, providing a refreshing and cooling effect. 

Unlike air conditioners, which use refrigerants to cool the air, air coolers use only water and air, making them more energy-efficient and environmentally friendly. For a comprehensive guide on air coolers and a deeper understanding of their functionality and air cooler benefits, check out our comprehensive guide to air coolers.

Types of Air Coolers

An air cooler can be classified into various types based on their size, functioning, and utilities. Following are some of the most common types of air coolers available in the market:

Personal Air Coolers

A Personal air cooler is specifically designed to provide targeted cooling for individual users in small spaces, making it ideal for personal use in areas up to 150 square feet. Their compact size and portability make them perfect for placing on desks, bedside tables, or any other convenient spot. 

These air coolers offer a refreshing breeze directly to the user, creating a comfortable microclimate around them. They often feature adjustable airflow settings, allowing users to customise the cooling experience according to their preferences. Additionally, personal air coolers are energy-efficient, consuming less power than traditional air conditioning units, which is beneficial for both the environment and energy bills.

Room Air Coolers

A Room air cooler is specifically designed to efficiently and effectively cool larger indoor spaces, such as living rooms, bedrooms, or offices. Depending on the model and cooling capacity, they can cool areas ranging from 150 to 300 square feet or even larger. 

Room air coolers utilise the principle of evaporative cooling to lower the air temperature. They draw warm air from the room and pass it through a water-soaked cooling pad. As the warm air passes through the pad, the water evaporates, absorbing heat from the air and cooling it down. The cooled air is circulated back into the room, creating a comfortable and refreshing indoor environment.

Tower Coolers

A Tower cooler offers an elegant solution to cooling medium to large rooms spanning from 300 to 500 square feet, with its tall and slender design maximising cooling efficiency while occupying minimal floor space. These sleek units efficiently circulate cool air throughout the room thanks to their larger cooling pads and powerful fans. 

Equipped with advanced cooling technologies like honeycomb cooling pads and multi-speed fan settings, tower coolers ensure consistent and refreshing airflow, maintaining optimal comfort levels even in hot climates. Their energy-efficient operation further enhances their appeal, providing an environmentally friendly cooling option for those seeking effective and stylish cooling solutions for their living spaces.

Window Coolers

A Window cooler, also known as a window air cooler or window-mounted evaporative cooler, is relatively easy to install and is suitable for specific window types, such as sliding windows or casement windows. The installation typically involves securing the cooler into the window opening using mounting brackets or adjustable panels provided with the unit. 

First, the window is opened, and the cooler is placed in the frame. Then, the unit is secured using mounting brackets or panels to ensure a snug fit and prevent air leakage. Some window coolers may require additional sealing around the edges to minimise air leaks and maximise efficiency. Once installed, window coolers draw in warm air from the outside, pass it through moistened cooling pads, and circulate the cooled air into the room, providing effective and energy-efficient cooling.

Desert Air Coolers

A Desert air cooler is exceptionally effective in dry climates and larger rooms exceeding 500 square feet, offering a refreshing and energy-efficient cooling solution. These coolers use natural evaporation in arid regions with low humidity to cool the air. They draw in warm, dry air from outside, pass it through moistened cooling pads, and circulate the cooled air into the room, adding moisture and creating a comfortable indoor environment. 

Equipped with larger cooling pads and powerful fans, desert air coolers are well-suited for cooling expansive living spaces, commercial areas, or outdoor environments. Their ability to efficiently provide cooling relief while increasing humidity levels makes them a practical and environmentally friendly alternative to traditional air conditioning systems in dry climates and larger rooms.

Choosing the Right Cooler Size for Your Room

CFM, or Cubic Feet per Minute, is a measurement of airflow volume, indicating how much air a fan or air cooler can move within a minute. It is an important measure to be considered while selecting the right cooler size for your room.

You must be wondering how to calculate CFM for air cooler. To measure your room size, multiply the length by the width by the height. For example, if your room is 10 feet long, 12 feet wide, and 8 feet high, the calculation would be 10 feet x 12 feet x 8 feet = 960 cubic feet. In this context, air coolers CFM measures the rate at which cool air is circulated into a room. The higher the CFM rating, the more air the cooler can move, resulting in faster cooling and better circulation. This way, you can decide the best air cooler size for the room.

Additionally, climate plays a crucial role in determining a room's cooling requirements. Evaporative coolers are particularly effective in hot and dry climates, where temperatures soar and humidity levels are low. These climates often necessitate air coolers with higher CFM ratings to provide sufficient cooling power. Since evaporative coolers rely on the evaporation of water to cool the air, dry climates enhance the evaporative process, making higher CFM ratings necessary to maintain comfortable indoor temperatures.

The number of occupants in a room directly impacts its cooling needs. More people generate additional body heat, increasing the overall temperature of the space. As a result, rooms with higher occupancy require more robust cooling solutions to maintain comfortable conditions. 

Air coolers with higher CFM ratings are better equipped to handle the increased heat load of multiple occupants, ensuring effective cooling for everyone in the room. Consideration of the number of occupants helps determine the appropriate size and capacity of the air coolers needed to meet the cooling demands of the space.

The following table will help you identify the right cooler based on your room size and the CFM range.

Room Size

CFM Range 

Cooler Category 

Small Room

Upto 150 Sq Ft

Personal Air Cooler 

Medium Room

150 to 300 Sq Ft

Room Air Cooler 

Large Room

300 to 500 Sq Ft

Tower Air Cooler 

Extra Large Room

500+ Sq Ft

Desert Air Cooler 


In conclusion, choosing the right size cooler is essential for achieving optimal cooling performance and an energy-efficient air cooler in your space. By accurately assessing your room's dimensions and selecting a cooler with the appropriate cooling capacity, you can enjoy effective cooling while minimising energy consumption and costs. 

Furthermore, air coolers offer many benefits beyond just cooling, including efficient and eco-friendly operation, improved air quality, and cost-effectiveness. These versatile cooling solutions are particularly advantageous in dry climates and larger rooms, where they relieve hot temperatures while simultaneously adding moisture to the air, creating a more comfortable indoor environment.

To make the best choice while getting yourself an air cooler, don’t forget to explore the various types of air coolers mentioned in this blog, from personal air coolers to tower coolers and desert air coolers. Each type offers unique features tailored to different needs and preferences, allowing you to select the ideal cooler to enhance your comfort and well-being in any setting. 

So, whether you're seeking relief from the summer heat or simply looking to create a more refreshing indoor environment, there's an air cooler out there to suit your needs.