How to buy an Evaporative Cooler


In summers when the temperatures rise, the indoor temperature also increases making the environment hot and uncomfortable.  Evaporative Coolers, which are also called Swamp Coolers, provide an alternative to an Air Conditioner. They are cheaper to install and economical to operate as they consume much lower electricity than Air Conditioners. They are also considered as eco-friendly and healthy.

Evaporative Coolers operate on the principle that when dry air flows over material damp with air, the water gets evaporated and in this process, cools the material along with the air which passes over it. This air is fanned inside the room which results in lowering the temperature of the interiors.

Points to consider when buying an Evaporative Cooler...

Following points should be considered when planning to purchase Evaporative coolers.

1. Will the Evaporative cooler effective in my location?

The key to effectively cooling your home with an evaporative cooler is hot, dry air such as what is found in desert areas. In fact, evaporative coolers are most effective during the hottest times of the day and when humidity levels are low. Because of the potential for moisture build-up indoors, an open window or door is required for use and not recommended for indoor use in humid climates.

2. Benefits of Evaporative Coolers compared with traditional air conditioning systems?   

When compared to air conditioners that use refrigerated cooling systems, operating Evaporative Coolers costs up to 50% less and operation cost are a third of air conditioning costs. Plus they don’t use any toxic gas and are eco-friendly. There is a constant circulation that ensures that your indoor air is fresher than it would be with traditional air conditioners that require an airtight space to operate. Plus, the evaporative cooling process naturally humidifies dry air - reducing dry air symptoms such as itchy eyes, throat, or skin.

3. How to calculate the size of Evaporative Cooler for your space?

You should ensure that you purchase the correct size/capacity of the Evaporative cooler for the area you need to be cooled. Evaporative coolers are rated by the cubic feet per minute (cfm) of air that they deliver to the house. Most models range from 3,000 to 25,000 cfm. The cfm (cubic feet per minute) is the amount of fresh air cycled through your environment each minute. To find the cfm, follow this formula: Square feet needed to be cooled multiplied by ceiling height (in feet). Then divide this number by 2.

For example, if your room is 450 square feet with 8-foot ceilings: 450 X 8 / 2 = 1,800 cfm. As a general rule of thumb; residential models range anywhere from 3,000 to 8,500 CFM. If your home is larger than average, a CFM count of 7,000 or more would probably be ideal, and if your home is about average (or even smaller), anything between 3,500 and 5,500 would suit it just fine.

4. What are different types of Evaporative coolers available?

Evaporative coolers come in many models and sizes.  Some of these are following:

Portable Evaporative Coolers:  These are designed for a single room or a small area. The biggest advantage is that they need not to be installed and be easily moved around according to your need.

Window Evaporative Units: These are larger units and need to be installed. They are designed to cool either single rooms or even much larger spaces.

Down Discharge Evaporative Coolers:  These are typically large units installed on the roof and can provide cooling to many rooms or even the entire house. Down discharge evaporative coolers are installed on top of a roof, and then discharge their cold air in a downward motion to help cool the entire home.

5. How much maintenance is required for Evaporative Coolers?

If your Evaporative Cooler operates round the clock then you have inspected and/or clean at the pads, filters, water reservoir, and pump at least once a month. Depending on the usage and type of pads you have to replace them as per manufacturer’s recommendation. The filter and water curtains of the portable Evaporative Cooler should be inspected and cleaned if necessary twice a month with lukewarm water and a mild detergent to  remove dust, dirt, mould, and mildew build-up.

6. What are the drawbacks of Evaporative Coolers?

Evaporative Coolers operate best in dry climates so not areas are suitable for them plus they add humidity to the air in your home. They also require simple routine care maintenance about once a month. Evaporative coolers require a continuously supply of running water.

7. How to choose the best Evaporative Cooler?

Evaluate is whether you are located in a dry climate area. If your area is humid then the Evaporative Cooler is not the best option you. Select the proper size based on your room/ house size and chooses from many models available in the market. If you just need to cool one room then a portable model is a good option, otherwise buy a window unit. Purchasing an evaporative cooler doesn't need to be difficult and you may use the tips and advice given above and be sure to enjoy the summer while having the cool indoors.

If you wish, Popular Evaporative Cooler Models can also be viewed by clicking on any of the images provided below…

Finally, it would be greatly appreciated by the community if you can share your own experiences of buying your own Evaporative Cooler (good or bad) by leaving a comment in the comment box below – So that the community can learn also!

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