I am hoping someone can help me. I have read through the questions and answers on here but I am still lost. I have the same GeneralAire M3 thermostat and it does not indicate to me what the percentage I am setting it to. All it has is a low and high with a comfort range in the middle. I have tried to set it high or close to high as I keep my indoor temperate at 72 and I bought an indoor thermometer and it shows my humidity level is dry at 19% but I have the thermostat set at high and my windows have a little bit of condensation in the middle of the window. So I'm at lost on how I should adjust my thermostat. Can anyone provide any suggestions ?? I would greatly appreciate it.