Yes, an air cooler works better in practice with ice cubes, but the effect is modest and temporary. The ice makes the water in the tank colder, which makes the air flowing past it feel a bit fresher. Once the ice has melted, the air cooler functions again like a normal air cooler with cold water. It is therefore a useful extra, not a replacement for a real air conditioner.
Direct answer: ice cubes in the water tank make the airflow of an air cooler noticeably fresher, especially in the first few hours. The difference remains limited, because an air cooler cools through evaporation and not with a refrigerant like an air conditioner.
Why do ice cubes help in an air cooler?
An air cooler allows air to flow past a wet filter or wet cloth. The water evaporates and draws heat from the air in the process, so that the breeze that comes out is slightly cooler than the room air. The colder the water, the less heat it transfers to the air itself and the fresher the breeze feels. Ice cubes lower the water temperature immediately, so you notice it especially the moment you add them.
More explanation about how it works can be found in our article What is an air cooler and how does it work?. There you can also read why an air cooler works particularly well in a small space or at a personal spot, such as your desk or bedside table.
What is the smartest way to use ice cubes in an air cooler?
Fill the tank first with cold tap water and then add the ice cubes, up to about the maximum fill level stated in the manual. Prefer using small cubes rather than large chunks, as they melt faster and cool the water more evenly. Leave the air cooler on a stable, flat surface and aim the breeze at yourself instead of the whole room.
The Dynter SM211 is specifically designed for this: according to the product page, you fill the water reservoir with water and/or ice. If you add cold water, you get extra cooling according to the manufacturer. If you freeze ice cubes or cooling elements beforehand, you always have a fresh supply on hand.
What are the limitations of an air cooler with ice?
An air cooler does not lower the temperature like an air conditioner. Because the water evaporates, moisture also enters the air. In a small, closed room, it can therefore start to feel clammy. Therefore, open a window slightly from time to time or ventilate briefly, and use the air cooler preferably in a room where you are sitting yourself.
Also, ice is not necessary for the air cooler to work. Without ice, it still cools, just slightly less strongly. How long you benefit from the ice depends on the room temperature, the amount of ice, and the amount of water. Do you want to know how often you need to refill, read How much water does an air cooler use and how often do you refill it?.
Air cooler with ice, with cold water, or a portable air conditioner?
The table below sets the three options side by side. The estimate is general and does not count as a measurement result; in practice, it depends on your space and the weather.
| Option | Perceived cooling | Note |
|---|---|---|
| Air cooler with ice cubes | Fresher than with room-temperature water, especially at the start | Ice melts, so refill regularly |
| Air cooler with cold water | Pleasant breeze, less cold than with ice | Water warms up over time |
| Portable air conditioner | Actually lowers the room temperature | Higher consumption and usually a discharge hose to the outside |
A detailed comparison can be read in Air cooler versus portable air conditioner: the most important differences.
The Dynter SM211 air cooler
The SM211 is a compact and portable air cooler for home, at the office, or on the go. You charge it with the included USB-C cable and after that, it works wirelessly.
Speeds: three adjustable speeds
Battery: 2000 mAh, according to the product page up to 3-4 hours of cooling after a full charge
Cooling: hydro-cool technology, water reservoir can be filled with water and/or ice
Dimensions and weight: 16.5 x 16.5 x 17 cm, 880 grams
Extra: whisper-quiet according to the manufacturer and equipped with a soft LED night light
Do you want to try it yourself? Check out the Air Cooler SM211 Black or the Air Cooler SM211 Grey, or look in the collection of air conditioners and fans for all options.
Frequently asked questions
Do you have to put ice in an air cooler?
No, it is not mandatory. An air cooler also works with just water; ice only makes the breeze fresher.
Can I use regular ice cubes from the freezer?
Yes, as long as you do not exceed the maximum fill level from the manual. For the SM211, the reservoir may be filled with water and/or ice according to the product page.
How long does the effect of ice last?
That depends on the room temperature and how much ice you use. Once the ice has melted, the air cooler works again with cold water.
Does the room get colder because of an air cooler with ice?
Not like with an air conditioner. You mainly feel a fresher airflow in the place where you are sitting.
Is an air cooler suitable for the bedroom?
That is possible, especially because the SM211 is whisper-quiet according to the manufacturer and has a soft night light. Do provide some ventilation, however, as evaporation increases the humidity.