1. Look at Reverse cycle air conditioners
2. Install insulation to prevent heat loss by slowing down heat loss in winter and heat gains in summer.
3. Look for draughts - weather proofing makes your home warmer in winter and cooler in summer
4. Look at getting drapes/blinds/ window films which can prevent heat gains in summer
To ensure getting enough air during summer the best approach is to:
· Open it up - The easiest and most cost-effective way to ventilate your home is to open it up when the outside temperature is comfortable. Cool down your home in summer by opening doors and windows at opposite sides of your house.
· Plan for cross-ventilation - When building or renovating, plan for cross-ventilation from front to back, and between each side of the house. During hot summer days, cross-ventilation will allow you to take advantage of the cooling southerly breezes of early evening.
· Use fans, they are very cheap to use and effective.