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Maintaining a temperature around 24°C - 26°C offers both cooling comfort and decent energy savings for daily use without overloading the system.
Setting the AC’s temperature to 27°C reduces power consumption dramatically, although some users may find it less cooling during peak summer heat.
Features like Eco Mode and Sleep Mode, along with simple steps like closing doors and curtains, can noticeably reduce your electricity bill over time.
If you want to sleep well during summer nights, it mostly depends on how you use your air conditioning. Many people think that lowering the temperature to uncomfortable levels improves indoor conditions. However, such actions result in increased usage of electricity and hefty bills, while interrupting natural sleep patterns and pushing the air conditioner to work harder.
Users should maintain their bedroom temperature at night between 60 and 67 degrees Fahrenheit to create an atmosphere that enables both sleep and productivity.
The new regulations in India set AC temperature standards between 20°C and 28°C, creating an optimal nighttime temperature that provides comfort while reducing energy costs and protecting the environment.
People use air conditioning during the day to stay productive and manage hot weather. At night, the body’s metabolic rate naturally decreases, making slightly cooler temperatures more comfortable for sleep. 18°C causes excessive cooling, extending compressor operation times and increasing energy costs. This also results in users waking up with dry throats and muscle stiffness.
Experts suggest that 26°C with sleep mode enabled is the sweet spot. Sleep mode gradually raises the temperature throughout the night, preventing overcooling while keeping the room comfortable.
Every 1°C increase in AC temperature saves about 6% energy. When ACs usually run for 6 to 8 hours at night, this difference increases. For example:
Setting at 24°C vs 22°C could save nearly 12% of energy consumption.
Across households, this translates into gigawatts of national savings during peak demand.
Also Read: Things to Check Before Buying an Air Conditioner (Expert Checklist)
The government highlights the need for temperature regulation in air conditioning systems by leveraging scientific data and energy consumption patterns. Air conditioners are among the largest sources of electricity demand during peak times in India.
Extreme summer temperatures cause air conditioning systems to consume approximately 20% of the total electrical load, increasing the risk of grid instability. The total user demand becomes excessive when millions of individuals operate their air conditioning systems at 16°C or 18°C.
Key reasons behind the move:
Peak Demand Pressure: ACs contribute nearly 20% of India’s electricity load in summer
Grid Stability: Low temperatures (16°C to 18°C) put pressure on the national power grid system
Standardization: BEE mandates a 20°C–28°C range, with 24°C as the default
Energy Math: For every additional degree in AC temperature settings, we can save about 6% of the energy consumed
National Savings: Even small changes can save gigawatts of power during peak hours
The combination of regulatory measures and behavioral change initiatives demonstrates a comprehensive approach that aims to achieve two goals: maintaining user comfort and environmental sustainability while preventing the electrical grid from being overloaded by India's increasing demand for cooling.
The human body experiences optimal comfort at 25°C when wearing light clothing. Cooler nighttime temperatures facilitate sleep onset, but extreme cold disrupts sleep. Overcooling may cause the following:
Dry skin and throat irritation
Respiratory discomfort
Muscle stiffness due to constricted blood vessels
A balanced setting around 24°C–26°C avoids these issues while still supporting restful sleep.
Energy savings at night depend not just on the thermostat but on usage habits:
Enable Sleep Mode: Allows gradual temperature adjustment
Use Ceiling Fans: Enhances airflow, making higher settings feel cooler
Close Doors & Windows: Prevents cooling loss
Avoid Turbo Modes: Quick-cool settings waste energy
Maintain Filters: Dirty filters strain compressors and increase bills
Smart thermostats add another layer by learning sleep patterns and adjusting cooling automatically.
People experience nighttime humidity levels that have a major impact on their well-being. A temperature of 26°C can feel uncomfortable in coastal and other humid regions. The combination of a dry mode function and a temperature adjustment range of 1-2 degrees Celsius provides a solution that maintains comfortable conditions while avoiding excessive cooling.
Humid nights: 24–25°C with dehumidification
Dry regions: 26°C feels comfortable as sweat evaporates faster
Mild climates: Natural ventilation may suffice, reducing AC reliance
India can achieve 3 gigawatts of peak power savings when all households increase their air conditioning settings by 1°C during nighttime hours. Through strict regulations, this can lead to 60 gigawatts of savings by 2035, eliminating the need for multiple new power plants.
Also Read: AC Buying Guide 2026: How to Choose the Best Air Conditioner for Your Home
Families experience improved sleep quality and decreased AC unit usage, while the nation achieves climate responsibility.
Many users unknowingly waste energy at night. Here are a few things to watch out for:
Setting the air conditioning below 22° C
Neglecting sleep mode/timer features
Operating the air conditioner at full speed in cool environments
Failure to change settings in case of changes in temperature/weather
Avoiding these mistakes can improve both sleep quality and energy efficiency.
The AC temperature for nighttime energy conservation lies between 24 and 26 degrees Celsius. Maintaining this temperature provides comfort while reducing costs and helping India achieve its energy objectives when combined with sleep mode operation. The experience of excessive cooling temperatures creates a sense of luxury but results in financial losses and power grid issues.
The combination of advanced cooling settings and basic practices, such as fan operation and equipment upkeep, enables efficient cooling.
1. Is 27 degrees good for AC?
Ans: Setting your AC at 27°C is energy-efficient and helps reduce electricity bills, but it may feel slightly warm for some. While it works for savings, many still prefer slightly cooler settings for comfort.
2. Is 24 or 26 degrees better for AC?
Ans: Both 24°C and 26°C are efficient, but 24°C feels cooler and more comfortable, while 26°C saves more electricity. The better choice depends on whether you prioritize comfort or long-term energy savings.
3. How to use AC for a minimum bill?
Ans: To reduce AC costs, keep the temperature between 24 and 26°C, use sleep mode at night, and ensure doors and windows remain closed. Limiting indoor heat sources also improves efficiency and lowers electricity usage.
4. Which mode is best to save electricity?
Ans: Eco Mode is the most efficient AC setting, as it adjusts the compressor and fan speed automatically. This prevents excessive power use while maintaining comfort, helping reduce electricity consumption and overall energy costs.
5. Can AC be left on all night?
Ans: Yes, running the AC overnight is safe if it is properly maintained. However, use moderate temperatures and sleep mode to avoid high electricity bills, dryness, and unnecessary strain on the unit.
