Use an energy efficient air-conditioner. A 1.5kw unit will cost you $2 for 10 hours, where a 4kw unit is more than double at $5.75. That’s a saving of $450 over a 4 month period. *Based on 10 hours/day.

Our bodies adapt to changes in seasons and climate. Set your thermostat at 18-20°C in winter and no less than 26°C in summer.
In winter, 22°C may feel too hot and in summer it may feel too cold. People who live in warmer climates have a higher tolerance for heat and will probably find that a much higher temperature than 22°C feels comfortable. Save Energy

Put draught stoppers on all your doors and windows and save up to 40kg of greenhouse gas. Draught sealing around doors and windows can save up to 25% of heat losses and gains in many climate zones. Save Energy