Staying cool and getting a good night’s sleep during the warmer months can be a challenge. Many people wonder how to sleep in a hot room, after tossing and turning on warm nights and struggling to find the perfect temperature on their air conditioner. This article delves into tips from Fujitsu General on how to cool down to sleep on a hot night and ensure you wake up refreshed the next morning.

Did you know bedroom temperature can have a significant impact on sleep quality? Sleep experts link comfortable bedroom temperature and optimum body temperature with successful sleep. A lowering in body temperature is a natural function as we prepare for sleep^[1], which means a room temperature that is too high can lead to restlessness and poor sleep^[2].

In modern home designs, the bedrooms are often found upstairs. And as hot air rises, it can create an uncomfortable setting. Especially in summer when temperatures don't drop throughout the night, consider our tips on how to cool your body down at night .

1. Hydration is key: while appetites can sometimes be suppressed by heat^[3], regular fluid intake is necessary. Drinking water regularly throughout the day will help hydrate the body for the long hours of sleep ahead.
   
   
   
   
   
2. Natural is best: breathable bed linens such as cotton and linen promote airflow and ventilation^[4]. Natural fibres will absorb perspiration and keep bodies cool, dry and more comfortable on warm nights.
   
   
   
   
3. Get regular exercise: Exercise can improve the quality of your sleep, but it is best to avoid strenuous activities in the hours leading up to bedtime.
   
4. Install an air conditioner: Fujitsu General has a wide range of reverse cycle residential air conditioners to meet the needs of any home. A Fujitsu multi system enables temperature control in up to six rooms using individual indoor units and only one outdoor unit. Whether it’s the nursery, parent or teenager’s bedrooms, each space can be individually controlled by remote control and specific temperatures set for personalised comfort.
   
   
   
   
5. Get the temperature right: In summer, adjust the room temperature to create a cool and comfortable sleeping environment. Using the inbuilt features on certain models will help regulate the room temperature. If the home is insulated it will also help keep the cool air in the room and reduce energy consumption.

What temperature should I set my AC at night?

The ideal bedroom temperature ranges between 19-24°C [5], depending on the season. This range aligns with your body’s natural drop in core temperature that is experienced while sleeping. A cooler room enables your body to regulate this process naturally. Rooms that are too hot or too cold can impact cognitive functions. 

Maintaining a consistent temperature throughout the night is also important, as it helps to avoid disruptions in your sleep and ensure you wake feeling refreshed.

Using the programmable night mode on your Fujitsu General air conditioner (if equipped) will help to set and maintain a comfortable indoor temperature.

What is the best AC temperature for sleeping?

The most efficient temperature for sleeping in summer is between 22-24°C. In winter, this range decreases to betweeen 19-21°C [5]. This temperature range has aligns with the body’s circadian rhythm, which are the physical, mental and behavioural changes that repeat over a 24-hour cycle.

For more information on air conditioning solutions for your home, or if you have any questions about the programmable features of your existing system, contact Fujitsu General Assist on 1300 364 484 to speak to a member of our friendly customer service team.

How to Sleep on a Hot Night: Frequently Asked Questions

Are there any health risks associated with sleeping in an air conditioned room?

There are no known health risks associated with sleeping in an air-conditioned room. There are some things you should do to reduce the risk of developing any sickness from sleeping with your air conditioner on. 

Ensure the temperature is not set to its coldest level, the room is well-ventilated and the AC filters are kept clean to maintain a healthy indoor space.