No, 24°C (75°F) is generally not considered cold for air conditioning; it's a recommended comfortable and energy-efficient setting, especially in summer for cooling, striking a good balance between comfort and energy savings without being too chilly or wasteful, according to Australian guidelines and energy efficiency experts and climateplus.com.au. Some sources even suggest slightly higher for maximum savings (25-27°C) or cooler for more active households, but 24°C is a common "sweet spot" for general comfort, notes this Daikin article, this Alliance Climate Control article, and this Quora thread.
(Its suggested range is 23 C to 26 C.) 24 C: Recommended by the American Society of Heating, Refrigerating and Air Conditioning Engineers for when you are home during the day. It recommends a higher temperature at night. 22 C: This is considered the typical temperature for air-conditioned spaces in North America.
Understanding Temperature Perception
The perception of whether 24 degrees Celsius is warm or cold depends on context such as climate, season, and personal preference. In general terms: 24°C is considered a comfortable, mild temperature.
According to The Sleep Charity, the ideal bedroom temperature for sleeping is 16–18°C. Anything over 24°C could be too hot and make you restless, while trying to sleep in a cold room with a temperature below 12°C could make it harder to nod off.
Setting your air conditioner to 25°C (77°F) is more energy-efficient than lowering it to 18–20°C. According to the Bureau of Energy Efficiency, maintaining the AC temperature between 24°C and 26°C strikes the best balance between comfort and energy conservation.
Keeping your AC at 24°C is not only better for your comfort but also for your electricity bill. Whether you are a working professional trying to cut energy costs, a parent maintaining a cosy environment for your family, or a senior seeking gentle cooling, this temperature hits the sweet spot.
Our ideal body temperature for sleep is 18 to 19 degrees Celsius. Every degree above that makes it harder to sleep – and anything over 25 degrees can make for a very uncomfortable night.
Ideal Room Temperature in Summer
In summer, the ideal indoor temperature should generally stay between 73 and 78°F (23-25.5°C). However, the goal isn't just cooling the air, but keeping humidity low enough for sweat to evaporate and cool the body.
Research has found the ideal sleeping temperature is around 17 to 19 degrees Celsius. If this level can't be provided, then it helps to have air flowing over your skin to help cool your body. Good ventilation with an open window can help.
Some people naturally tend to feel colder than others without any discernible cause. However, cold intolerance can also indicate an underlying medical condition, such as hypothyroidism or anemia. Dysfunction of the thyroid gland, decreased arterial blood flow, and low body fat can all cause a person to feel cold.
Setting your AC between 22-24°C in summer creates an ideal balance of comfort and energy savings. Each degree cooler adds 5-10% to your energy consumption and electricity bills. At night, raise the temperature 2-3 degrees since your body naturally needs less cooling during sleep.
The 3-minute rule is a simple but important guideline: wait at least three minutes after turning your air conditioner off before turning it back on. That short pause gives the refrigerant pressure in the system time to equalize.
It strikes a balance between keeping you cool and preventing the air from becoming too cold. Keeping your AC temperature set at around 24-25 degrees Celsius (75-77 degrees Fahrenheit) means you're comfortable while balancing the workload of your AC unit.
It's a myth than running your air conditioner 24/7 will give lower running costs. It is far cheaper to turn the air conditioner off while you are out of the house or overnight while sleeping, and on again when you return or after the house warms up during the day.
A: Yes, sleeping from 10pm to 5am provides seven hours of rest, which is within the recommended range for most adults. However, everyone's sleep needs are different. Pay attention to how you feel during the day. If you're tired, you might need to go to bed earlier or adjust your morning wake-up time.
He said participants who slept at temperatures above 24C were more likely to be in a sort of "fight or flight" mode while sleeping. "When it gets above 24 degrees … particularly up towards 28 or 30C, physiologically there's a requirement for the body to try to lose heat.
Ideal Temperature:
Middle-aged adults prefer a room temperature of 20°C to 23°C (68°F to 73°F) in the winter and 23°C – 25°C (73°F – 77°F) in the summer.
An Air Conditioner working at 24 degrees consumes less power as the compressor works for a lesser time as compared to the same AC operating at 18 or 20 degrees. Be smart and save more.
Koalas are thickset arboreal marsupials with a thick grey fur. Found only living in Australia, they mainly live in the eucalyptus trees and spend around 22 hours of their time sleeping (90%). They spend the other 10% of their day eating and sitting around.
The bedroom temperature
So here's a fun fact: in Japan, people sleep in rooms that are around 55°F (13°C) on average. In the US? Americans like things warmer—68 to 72°F (20–22°C) kind of warm.