Fresh air enters the HatchBrood unit via a unique ventilation system installed on top of the unit's ceiling. This ventilation system is connected to each individual radiator, and the air enters the unit via inlet nozzles integrated into the radiator. The amount of incoming air is automatically determined by real-time CO2 and humidity levels. Used air will never re-enter the fresh air supply, since the nozzles function on overpressure. And with 84 inlet nozzles to each radiator, chicks are never farther than 0.5m from a fresh air supply point.