A 1000 m room is conditioned by an air plant, the desired ambient condition is 25C and 50% of relative humidity. The room has this specific: thermal load of 20 kW, humidity load of 17 kg/h and number of air volume changes of 3 h*. The external air is at 37C and 70% of relative humidity. Calculate: the air mass flow rate, the thermal power consumption of the single battery finally, verify that the ACE outlet temperature is greater than 15C, otherwise calculate th number of air volume changes that satisfy the limit and recalculate the above quantity