I am trying to figure out if there is a way to have an availability schedule that runs off the outdoor air temperature. I have been notified that this plant that supplies a building I am modelling with chilled water is only operating when the outdoor air temperature is above 10C. I am wondering if anyone else knows of a way to model this so that it doesn't run when below 10C. They didn't specify if that was dry or wet bulb temperature but I can worry about that if this is even possible. The technician that gave me this information is reliable and the historical energy consumption data points towards the system being off during the winter months.