Airflow (cmh) 23000 / 30000 / 40000 Voltage (V) A23 - 240V A23/A30/A40 - 415V Power (Watts) A23 - 1500W A30 - 3000W A40 - 3500W Fan Type Axial Fan Fan Speed A23/A30/A40 - Single Speed A23 - Multi Speed Size(cm) A23 - 120(L) x 120(W) x 98(H) A30 - 130(L) x 130(W) x 118(H) A40 - 130(L) x 130(W) x 118(H) Net Weight(kg) A23 - 55 A30 - 100 A40 - 120 Noise (dB) <78