Aluminum foil window hack and proper AC settings help reduce indoor temperatures

Applying aluminum foil to the exterior of windows creates a reflective barrier that can bounce back up to 97% of solar radiation. Experts say this simple DIY method can lower indoor temperatures by three to five degrees Celsius without the need for an air‑conditioner.

Correct use of air‑conditioners also improves comfort and cuts electricity bills. Technicians recommend setting indoor temperatures around 24‑26 °C, avoiding extreme temperature differences, directing airflow toward the ceiling or room centre, and regularly cleaning filters. These practices prevent excessive energy consumption and health issues such as eye dryness or throat irritation.