Why is my VentGrid temperature reading different than my probe reading?
Do you have a minimum ventilation rate greater than 0% in your VentGrid settings? If you have your minimum ventilation higher than 0%, it will cause the VentGrid to add to the vent rate because the start of the VentGrid will be whatever value greater than 0% you set it as. The VentGrid will show the temperature reading as what is operating at (actual temp + increased vent rate because of settings), rather than the actual temperature.