Tropical Nights

Problem

Wake up in the heat of a warm night

Increased number of tropical nights

Even if you turn on the air conditioner on all night or use the timer, do you still have trouble sleeping or wake up in the middle of the night because of the heat?

During tropical nights, the possibility of having heatstroke is said to be high not only because of the outdoor temperature but also because the indoor temperature is high. The heat can also disturb sleep which affects the physical condition.

Tropical nights problems and solutions

How to spend a comfortable tropical night – Humidity control

A comfortable room temperature and humidity are important for a peaceful tropical night.


How to sleep comfortably

Not only "Temperature" but also "Humidity" adjustment is an important key for comfort.
Comfortable air conditioner tips for humidity control at tropical nights

1. For those who want to use the air conditioner all night – Use the dehumidification operation and set the temperature to 28 degrees or higher

Figure is a sample image and conditions
depend on the environment.

Set the temperature above 28 ºC and reduce the humidity to 50 - 60% during dehumidification. By lowering the humidity, only the sensible temperature is lowered without overcooling the body. This way, sweat immediately dries up as well which makes it easier to sleep.

  • Depending on the model of the air conditioner, humidity 50 ~ 60% setting may not be available.
 

2. For those who do not want to leave the air conditioner on - Set your preferred temperature and set the timer to 3 hours

The amount of sweat increases immediately after going to bed. However, by cooling the room with a timer, the humidity is also controlled and sweat immediately dries up as well which makes it easier to sleep. If "off timer" is set to 3 hours, 2 cycles of deep sleep* can be secured immediately after falling asleep without being disturbed by temperature changes. This allows a stable deep non-REM sleep in the first half of the sleep period.

  • The average sleep cycle is said to be 90 minutes.

Enjoying the feeling of a good rest depends on how comfortable you feel when you wake up in the morning.

If sweat from sleeping makes your body sticky and uncomfortable immediately after waking up, it is a good idea to set the “on timer" on the air conditioner according to the time you wake up.

Reference

Use of air conditioners at tropical nights

1. 60% have trouble sleeping in summer heat. More than half cannot sleep comfortably during summer nights due to "trouble falling asleep" and “wakes up in the middle of the night" due to heat.

The answers to “do you have difficulties of sleeping when it’s hot even though you’re using air conditioners?” were “Yes – 17.1%” and “sometimes – 45.9%”, so more than 60% of respondents indicating that they felt it was too hot to sleep.

Furthermore, the answers to “sometimes I wake up in the middle of the night because of the heat” were “Yes - 14.2%" and "sometimes - 47.0%“, so nearly 60% of the respondents experienced having difficulty sleeping while waking up.

It became clear that there were many people who could not sleep in the bedroom on a summer night or wake up in the middle of the night so they could not sleep well. The fact that people do not feel the heat and sleep well while using their air conditioner suggests that they weren’t able to use the air conditioner in a better way.

Do you experience difficulty sleeping when it’s hot even though you’re using air conditioners?
Hot and hard to fall asleep (%)

Sometimes I wake up in the middle of the night because of the heat
Hot and wake up in the middle of the night (%)

2. “I left it on all night. - 23.5%”, “I use timer - 53.1%”, those who use the timer are almost 2 times more than those who leave it on all night!

The answers to “how do you use air conditioners when you sleep in the summer?” were “I left it on all night. - 23.5%” and “I use timer - 53.1%” which means using the timer is more common during summer.

3. No matter how you use the air conditioner, the result is still "It's hot and I can't sleep."

Furthermore, when we examined how many people experienced ‘It’s too hot to fall asleep.‘ with each type of air conditioner, we found that more than half experienced “It’s hot and I can‘t sleep” with all types of air conditioners. Majority of them use timers but the result says using timers does not lead to good sleep perfectly and seems additional arrangement is needed. For a pleasant summer night's sleep, it might be a good idea to review how you use your air conditioner.

How do you use the air conditioner when you sleep in summer?

Air conditioner usage (%)

Do the following things happen to you when you sleep at night during summer?

Hot and hard to fall asleep (%)

Hot and wake up in the middle of the night (%)

 
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