A fruiting chamber creates the humid, stable environment mushrooms need to grow from colonised substrate. It works by trapping moisture close to the growing mycelium while still allowing fresh air to exchange: too little airflow and growth stalls; too much and the surface dries out. Different chamber designs achieve that balance in different ways, whether through a passive humidity reservoir, a near-sealed lid, or an active humidifier on a controller, alongside filtered holes or vents for gas e … read more