1. Prefer air conditioners having automatic temperature cut-off.
2. Keep regulators at low cool position.
3. Operate the ceiling fan in conjunction with your window air conditioner to spread the cooled air more effectively throughout the room and operate the air conditioner at higher temperature.
4. Seal the doors and windows properly.
5. Leave enough space between your air conditioner and the walls to allow better air circulation.
6. A roof garden can reduce the load on Air Conditioner.
7. Use windows with sun films/curtains.
8. Set your thermostat as high as comfortably possible in the summer. The less difference between the indoor and outdoor temperatures, the lower will be energy consumption.
9. Don't set your thermostat at a colder setting than normal when you turn on your air conditioner. It will not cool your home any faster and could result in excessive cooling.
10. Don't place lamps or TV sets near your air-conditioning thermostat. The thermostat senses heat from these appliances, which can cause the air conditioner to run longer than necessary.
11. Plant trees or shrubs to shade air-conditioning units but not to block the airflow. A unit operating in the shade uses as much as 10% less electricity than the same one operating in the sun.