An air cooler works less effectively at high humidity. It cools by evaporating water, and this is less effective when the air already contains a lot of moisture. You will mainly feel the airflow and a slight cooling effect, but not a significant drop in temperature. The effect is clearly greater in dry air.
Why humid air limits the cooling of an air cooler
An air cooler is not an air conditioner. It does not use refrigerant or a compressor, but uses evaporative cooling. Air flows over a wet surface and absorbs moisture; the water removes heat from the air in the process. If the air is already almost saturated with moisture, very little additional water can evaporate and the temperature will barely drop. On top of that, an air cooler adds moisture to the room, which can make it feel sticky. Read our explanation about the difference between an air cooler and an air conditioner.
When does an air cooler work well?
An air cooler is most effective in a dry, warm room. In our article does an air cooler really work in warm weather you can read more about the conditions. If you use it in a humid or enclosed room, you will feel less cooling. It is better to place it close to where you are sitting or sleeping, so that you feel the airflow directly.
Tips to get more out of your air cooler in humid weather
Ventilate the room. Make sure that humid air can escape, for example by leaving a window slightly ajar. This prevents humidity from building up.
Use cold water or ice. According to the product page, the SM211 can be filled with water and/or ice. Read more about using ice in can you put ice in an air cooler.
Keep the device clean. In humid weather, a musty smell can develop more quickly. See why an air cooler smells musty.
Combine it with a fan. Do you want more airflow? Read using a fan and air cooler together.
Direct answer: an air cooler works limitedly at high humidity; ventilate, use cold water or ice, and keep your expectations realistic.
Dynter SM211: compact air cooler for dry, warm days
The Dynter AirFlow SM211 is a portable air cooler for home, office, or on the go.
Speeds: three adjustable speeds
Filling: water and/or ice in the water reservoir
Cordless: 2000 mAh battery, up to 3-4 hours of cooling after a full charge via USB-C
Dimensions and weight: 16.5 x 16.5 x 17 cm, 880 grams
Extra: soft LED night light
Overview: humidity and effect
| Situation | Expected performance | Advice |
|---|---|---|
| Dry, warm air | Noticeable cooling | Use the air cooler close by |
| Humid, stuffy air | Mainly airflow, little cooling | Ventilate and use ice |
| Closed room | Moisture builds up | Leave a window slightly ajar |
View the Dynter air cooler SM211 or the full collection of air conditioners and fans.
Frequently asked questions
Does an air cooler make the air more humid?
Yes, an air cooler adds moisture to the air through evaporation. In a small room, this can be noticeable.
Is a fan better in humid weather?
A fan does not add moisture and only moves air. It cools less than an air cooler in dry air, but can be more pleasant in humid weather.
Can I leave the air cooler on overnight?
The SM211 has a 3-4 hour battery. This is often not enough for a whole night.
Is an air cooler an alternative to an air conditioner?
Only for local cooling. An air cooler does not cool in the same way as an air conditioner.
Do I need to change the water?
Yes, change the water regularly and clean the device to prevent odors.