Hi guys. In am modelling an ideal load system. In my model I would like to fix the operative temperate at 20 for heating and 26 for cooling. I have defined a dual set point thermostat for all the conditioned zones and defined the thermostat on the operative temperature . When I run the simulation, the operative temperatures of the zones are not fixed to 20 ( heating month) and 26 ( cooling months)...but there is a deviation of approximately 0.5 Celsius .... Any body now how I can fix the temperature? so that in the output variable the operative temperature of the zones be constant. Thanks