The decision to sleep with windows open or closed when using air conditioning depends on personal preference, climate, and the efficiency of the air conditioning system. People's preferences and habits can vary widely, so there is no one-size-fits-all answer to this question. However, I can provide some general considerations:
Climate: In regions with hot and dry climates, opening windows while running the AC may not be as problematic since the humidity levels are relatively low. However, in areas with hot and humid climates, opening windows can allow humid air to enter the room, potentially making the air conditioning less effective and less comfortable.
Air Quality: If the outdoor air quality is poor, opening windows might not be the best idea, especially for individuals with respiratory issues or allergies. Dust, pollen, and pollutants can enter the room and degrade the indoor air quality.
Energy Efficiency: Opening windows while running the AC can reduce the system's efficiency because the cool air from the AC may escape, leading to increased energy consumption and higher electricity bills.
Noise: People who live in noisy areas might prefer keeping windows closed to minimize outside disturbances and get a better night's sleep.
Security: Open windows can pose security risks, especially on lower floors or in ground-level rooms, as they provide potential entry points for intruders.
Ultimately, it's up to individuals to decide what works best for them based on their specific circumstances and comfort preferences. Some people may prefer to sleep with the windows open for fresh air, while others might opt for a closed environment with the air conditioning on to maintain a more controlled and comfortable temperature. Additionally, some modern air conditioning systems have features to help manage humidity levels, making it more comfortable to sleep with the windows closed.