The residential sector uses about 30 percent of the total energy consumed in France, according to the French Environment and Energy Management Agency, known as ADEME. Many of these energy uses come from everyday household activities, such as heating and using electrical appliances. One simple way to reduce energy use is by turning off devices when they are not in use, as some continue to draw electricity even in standby mode. Devices like light indicators, digital clocks, remote control receivers, and Wi-Fi or Bluetooth modules need a constant power supply, even when not actively being used. Using a power strip with a switch can help users completely cut off power to multiple devices with a single action, reducing unnecessary energy consumption. Heating is the largest energy expense in French homes, accounting for about 65 percent of total household energy use. To reduce this, it is important to avoid overheating rooms and to minimize heat loss. A programmable thermostat can be used to adjust the temperature according to when the home is occupied. Regular maintenance of the heating system is also essential, as it helps prolong the life of the equipment, reduces energy costs, and ensures that the system functions efficiently. Reducing heat loss can be achieved by closing off unheated rooms and sealing air leaks. Improving insulation in the home can also significantly cut down on heating needs. Insulating the roof or walls can save between 10 and 20 percent of energy consumption, and adding insulation to lower floors can provide an additional 5 to 10 percent reduction. Hot water is the second-largest energy expense in French homes, making up between 11 and 15 percent of energy bills, according to the energy company ENGIE. Reducing hot water use can therefore lower overall energy needs. Taking shorter showers, which typically use between 40 and 60 liters of water, is one effective way to cut consumption. Setting the water heater to a temperature between 55 and 60 degrees Celsius can also help avoid unnecessary energy use linked to maintaining excessively high water temperatures. Excessive indoor humidity can negatively affect thermal comfort by making the air feel colder than it actually is, potentially leading to increased heating use. A dehumidifier can be used in homes with high humidity to extract moisture from the air and release drier air into the room. These devices should be placed in well-ventilated areas for optimal performance. Even in winter, daily ventilation is important for maintaining good indoor air quality. It is recommended to open windows for about five minutes in the morning and evening to refresh the air without causing a significant drop in indoor temperature.