Airflow (cmh) 23000 / 30000 / 40000 Voltage (V) T23 - 240V T23/T30/T40 - 415V Power (Watts) T23 - 1500W T30 - 3000W T40 - 3500W Fan Type Axial Fan Fan Speed T23/T30/T40 - Single Speed T23 - Multi Speed Size(cm) T23 - 120(L) x 120(W) x 98(H) T30 - 130(L) x 130(W) x 118(H) T40 - 130(L) x 130(W) x 118(H) Net Weight(kg) T23 - 55 T30 - 100 T40 - 120 Noise (dB) <78