PROBLEM TO BE SOLVED: To suppress unnecessary increase of humidity, in an air conditioning system for a cultivation chamber.SOLUTION: An air conditioning system for a cultivation chamber provided with first and second air conditioners 20, 30 capable of switching between cooling operation and air feeding operation. The first air conditioner 20 mainly is used for treatment of sensible heat load, and the second air conditioner 30 is used for treatment of sensible heat load and latent heat load. When a room temperature Tr of a cultivation chamber 1 is within a predetermined temperature range, and humidity is equal to or more than a predetermined upper limit value (HU) by an index correlated to the humidity of the cultivation chamber 1, an operation control unit 51 configured to perform cooling operation is provided in the second air conditioner 30.SELECTED DRAWING: Figure 3【課題】栽培室用空調システムにおいて、不要な湿度の増大を抑制できるようにする。【解決手段】冷房運転と送風運転との切り替えが可能な第１及び第２空調機（20,30）を設ける。第１空調機（20）は、主として顕熱負荷の処理に用い、第２空調機（30）は、顕熱負荷及び潜熱負荷の処理に用いる。栽培室（1）の室温（Tr）が予め定めた温度範囲内で、且つ栽培室（1）の湿度に相関する指標によって該湿度が所定の上限値（HU）以上であることが示された場合には、第２空調機（30）に冷房運転を行わせる運転制御部（51）を設ける。【選択図】図３
