# IEQ 2.2 Cross Flow Ventilation
# Applies to
Single dwellings, extensions and Multi-dwelling (dual occupancy, townhouse, villa unit etc)
Objective
To provide fresh air and passive cooling opportunities.
# Summary
Points are awarded where all habitable rooms are designed to achieve natural cross flow ventilation. All habitable rooms must meet the rules for cross ventilation as follows:
- A breeze path between 2 ventilation openings either within the room or from one room to another.
- Breeze path length less than 15m measured between ventilation openings and around internal walls, obstructions & partitions.
- Ventilation openings located either in opposite or adjacent external walls or an external wall and an operable skylight.
- Size of ventilation openings greater than 2% of total floor area or 1m2, whichever is greater. The opening is the maximum allowable clear open area for the window. ie if floor area of room is 55m² then clear open area of window / door must be at least 1.1m²
- No more than 1 doorway or opening <2m² between the ventilation openings.
- Where the breeze path travels through an internal door, that door must be provided with door catches.
- If on adjacent walls, ventilation openings must be at least 3m apart at their closest point. This is to ensure the space has reasonable ventilation throughout and not just in one corner.
- If relying on a courtyard adjacent to a ventilation opening the courtyard must have a minimum depth of 3m from the window or be a minimum size of 9m2
# Documentation & evidence required
Floorplans with compliant dwellings marked, or a list of dwellings that comply.