Natural ventilation

Remove heat or exchange indoor air without relying entirely on powered air movement.

Pressure differences from wind and temperature move air between openings. The whole inlet-to-outlet path determines whether occupied spaces benefit.

Context. A climate- and operation-dependent strategy. A project may need controlled mechanical ventilation, filtration or cooling as well.

1. Read the conditions

   Check when outdoor air can help, including night temperatures, humidity, pollution and noise.

2. Draw the whole route

   Connect inlets, rooms, transfer paths and outlets. Include the effect of closed internal doors.

3. Plan operation

   Decide who opens what, when it should close, and how the building operates in unsuitable weather.

Opening

Coordinate free area with screens, rain protection, security and the actual opening mechanism.

Internal partition

A transfer route must also respect privacy, sound and fire-separation requirements.

• Air travels directly between nearby openings and bypasses occupied rooms.
• Night cooling is assumed to work where nights remain warm or humid.
• Uncontrolled leakage is counted as dependable fresh-air provision.

A classroom after a hot day. Trace a night-purge route through the room, then test the same proposal against street noise, rain and security. The operating plan is part of the design.

What this guide covers. The sketch does not calculate airflow, comfort or indoor-air quality. Those outcomes depend on weather, geometry, loads and operation.