Room: Ventilation Tunnel [Tournament Wiki]
Ventilation Tunnel
The ventilation tunnels allow air circulation between the different rooms improving the habitability of the anthill.
It also improves the defensive efficiency of the Gatekeeper caste.
Capacity : + 10
+0.5% 
Ventilation tunnels will cool the anthill by increasing humidity.
* It is unlocked by completing "Builder" caste quests.