Using passive ventilation for cooling
In warmer, more humid regions, passive ventilation for cooling should be included in house design. (Design of passive ventilation explains how to calculate air flow rates).
Considerations when designing a home for passive cooling:
• Locate, orient and design a form that maximises exposure to cooling breezes.
• Ensure there are good air flow paths through the building.
• Specify windows that maximise air flow but minimise unwanted heat gain
• Where possible, specify low level (i.e. near the floor) horizontal openings as these are more effective than vertical openings for ventilation purposes.
To avoid draughts, the maximum air speed recommended for cooling is approximately 7.5 m/s.
Passive ventilation for cooling in the summer must be counter by restricted incoming air in winter, so that minimum fresh air requirements can be maintained without causing draughts or excessive heat loss.
Active ventilation
Using passive ventilation for coolingIn warmer, more humid regions, passive ventilation for cooling should be included in house design. (Design of passive ventilation explains how to calculate air flow rates).Considerations when designing a home for passive cooling:• Locate, orient and design a form that maximises exposure to cooling breezes.• Ensure there are good air flow paths through the building.• Specify windows that maximise air flow but minimise unwanted heat gain• Where possible, specify low level (i.e. near the floor) horizontal openings as these are more effective than vertical openings for ventilation purposes.To avoid draughts, the maximum air speed recommended for cooling is approximately 7.5 m/s.Passive ventilation for cooling in the summer must be counter by restricted incoming air in winter, so that minimum fresh air requirements can be maintained without causing draughts or excessive heat loss.Active ventilation
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