best air cooler

Best Selling Air Coolers in India

1. Crompton Ozone 75-Litre Desert Air Cooler

When you are looking for a good desert cooler to beat the summer heat, there are few brands that stand out. One of those brands is the Crompton Ozone 75 Liter, Desert Cooler. If you are looking for coolers this year, there are a few upgrades in traditional cooler technology that you will find interesting. 

 

The Crompton Ozone 75 Litre Desert Air Cooler works best when kept in an area where cross ventilation is available. Cross ventilation allows the excess humidity to escape while retaining the cool temperature. As it is a powerful cooler, it throws cooled air for a distance of up to 52ft. This effective cooling is due to the new honeycomb design cooling pads.    

Best features

• Extra effective cooling due to honeycomb pads that provide better flow and faster/more effective cooling of air.  
• Powerful heavy-duty cooling capability which ensures that a large room or hall will be cooled effectively and quickly. 
• With an efficient electricity consumption of only 190w per hour, this cooler is not going to give you sleepless nights over electricity bills. 

Capacity: 75 liters 

Dimensions: 61cm by 40.5cm by 120cm.  

Warranty: 1 year

Pros:

• This cooler provides extremely effective cooling
• It is not very expensive as compared to other coolers in its range

Cons:

• The cooler is by no means compact and small 
• The cooler comes in a limited variety of colors

 

2. Havells Celia 55 Litre Desert Air Cooler

When you’re looking for a nice cooler, something aesthetically appealing yet effective, the Havells Celia Desert Air Cooler 55 liters, is what you are looking for. It offers you a range of features that make it convenient for your personal use. One of those features is a remote control that enables you to adjust its functions like you would an AC. 

The Havells Celia Desert Air Cooler 55 Liters offers you a silent cooling experience making it ideal for the bedroom or home use. With the specifically designed fan technology, it ensures powerful cooling very silently. Additionally, it also offers other features such as fully collapsible louvers, which prevent dust and insects from entering it, meaning lower maintenance. 

On the whole, owning the Havells Celia Desert Air Cooler 55 Liters offers you a convenient and pleasurable experience. The Havells Celia Desert cooler is designed to ensure that you have an excellent user experience. It comes with all the other features that one would expect and a few more. 

Best features

• It provides you the ease of use due to the remote control facility that it comes with. 
• 3 side honeycomb pads to ensure quickest and most effective cooling. 
• Other convenient features include a cord winding station, eliminating messy cords all over the place, and the auto-fill feature/function eliminates the need to manually refill continually.

Capacity: 55 Litres

Dimensions: 66cm by 51cm by 111.5cm

Warranty:  1 year home service and repairs

Pros: 

• Statistically speaking, it has a high user rating of 4.5 out of 5 from 217,877 users. 
• It comes with a 1-year warranty

Cons:

• It is not the cheapest cooler available in its range
• It does take up a bit of space due to its 55-liter capability

 

3. Symphony Siesta 70 Litre Air Cooler

 

If you’re looking for a cooler that provides you with the perfect cool environment, then the Siesta 70 Litres Air Cooler is what you’re looking for. The cooler provides you with excellent cooling delivery that is sure to meet your home needs this summer. The cooler can effectively cool 370sq ft of space and is ideal for a small hall or large room such as a living room. 

Some of the features that may be of interest to you are the 16 ‘’ fan size, specially designed grills to enhance airflow, casters to move it around easily, and excellent aesthetic appeal that makes it a delight to look at also. These are all important features to consider when you plan to purchase a cooler this summer. 

The cooler also provides you with beautiful aesthetic appeal, making it ideal for home use. Traditionally, coolers were known to be cumbersome, ugly, and noisy. All these flaws have been done away with in the Symphony Siesta 70 Ltr Air cooler. Additionally, you will also note that the build quality of the product is excellent, and leaves no room to complain.

Best features:

• The cooler is made of excellent quality materials, and the fit and finish are excellent. 
• It is reliable/durable and does not malfunction or have technical problems easily

It is affordable and cools effectively.  

Capacity: 70 Liters

Dimensions: 61.8cm by 50.5cm by 111.5 cm

Warranty: 1 year

Pros: 

• The cooler cools very efficiently and quickly
• It is competitively priced for its price range

Cons:  

• It does not come with a remote control feature
• It is not compact and small owing to its 70-liter size

Working of air coolers

Most of the coolers available today are evaporative coolers also known as swamp coolers or desert coolers. In these coolers, hot air from outside is passed over water. The water takes up the heat from the outside air and it evaporates. Hence due to the transfer of heat from air to water, the temperature of air decreases, making it comparatively cooler. This cool air is then directed inside the room. This process when repeated constantly brings down the overall temperature of the room making it pleasant during a hot sunny day.

The outside air is drawn into the cooler with help of a fan where it passes through the cooling pads. The evaporation of water takes places within these cooling pads. A pump is used to bring the water on the top of the cooling pads and is then allowed to trickle down through the pads.

As the working of the coolers involves only evaporation of water, it is the most environment friendly way of space cooling. There is no involvement of cooling gases, and so now you can cool yourself without adding to global warming!

Things to be considered while buying a cooler

For a cooler to work efficiently it is very important to use a cooler having correct size as per the size of the room you want to cool. The sizing of coolers is determined by a unit called CFM that is, Cubic feet per minute. The CFM is a unit that is used to measure the air flow. The higher the CFM means the fan is moving more air into the room. There is a simple calculation that will help you find the right size of the cooler you need.

Air delivery or Air displacement (in CFM) = Area of room in square feet x height of your room / 2

(The factor 2 in the denominator denotes that the air in the room is changed once in every 2 minutes)

For example if your room is 100 square feet in area and the ceiling is 8 feet high then,

Air delivery or Air displacement (in CFM) = 100 x 8 / 2

                                                                 =400 cubic feet/ min

But most of the leading brands today mention the air displacement in cubic metres / hour.

So to convert CFM to to cubic metres/hour multiply CFM Value by a factor of 1.699.

1 cubic metre/ hour = 1.699 x 1 CFM.

In our example the size of cooler required is 400 CFM which is equivalent to ,

1.699 x 400 = 680 cubic metres / hour (approx).

It is very important to have a cooler of the right size, if the cooler is smaller than the size required then it will have to work for longer time to cool the room and so it may consume more energy depending on the difference in wattage of the small and right sized coolers.

Also Read: Best Dishwashers in India

Effectiveness of Coolers in various temperatures

Air coolers work the best in hot and dry climates. The working of the air coolers depends on the evaporation of water into the atmosphere. Hence if more water evaporates, the air will be cooler. But there is a limit to the air holding capacity of the atmosphere, so if the air is already humid, it will not be able to hold more water and as a result the air is not cooled to the extent it would cool in drier climates. Hence higher the humidity, lesser will be the effect of the coolers. Now a days manufactures are making coolers with a feature called ‘Humidity Control’ to overcome this drawback. Many leading brands such as Bajaj and Symphony manufacture models having special features for controlling humidity and can be used in humid coastal regions as well.

The figure shows the relation between the outside temperatures and the humidity in the air.