We use an Air Handling Unit(AHU) to supply heating & cooling to our office. The current temperature/humidity setting of the unit is 22degrees/50%RH.

I would like to increase the temperature to 27/28 degrees with reduction of chilled water usage in mind which would result in reduction of costs.

What I am trying to find out is: If the Temperature is increased to 27/28 degrees, will the AHU be running efficiently trying to maintain the relative humidity at 50%RH or will power usage be increased for this setting. (For this example take the outside temperature to be at 25 degrees)

Any advice on this would be much appreciated.