Air inlet at the wall

How this node works

A ventilation pipe runs through the perimeter wall, connecting the air space to the outside through a grille; opposing inlets create the cross-flow that flushes out moisture and radon. The grille keeps out water, leaves and small animals.

Key points

• Perimeter wall
• Slab over the igloo
• Air space (sub-floor)
• Ventilation pipe (through)
• External grille
• Blinding