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Hi, I have an issue with Zone Mean Air Temperature. I haven't defined any heat gains in the zone and there is no heating or cooling in the zone itself. There is ventilation defined in the zone that is 0.5ach. Also, the U-values of walls and windows are 0.3 and 1.5 W/m2K, respectively. I have an issue that when outdoor air dry-bulb temperature is 8 degrees celsius, zone mean air temperature is 28 degrees celsius, or when outdoor air dry-bulb temperature is 6.25 degrees celsius, zone mean air temperature is 24.5 degrees celsius (mainly at 15:00). There are no heating loads in the room, nor there are heating and cooling, I don't know what can cause such an increase in the temperature of the room, are solar gains really that much increasing the mean temperature of the zone?

Hi, I have an issue with Zone Mean Air Temperature. I haven't defined any heat gains in the zone and there is no heating or cooling in the zone itself. There is ventilation defined in the zone that is 0.5ach. Also, the U-values of walls and windows are 0.3 and 1.5 W/m2K, respectively. I have an issue that when outdoor air dry-bulb temperature is 8 degrees celsius, zone mean air temperature is 28 degrees celsius, or when outdoor air dry-bulb temperature is 6.25 degrees celsius, zone mean air temperature is 24.5 degrees celsius (mainly at 15:00). There are no heating loads in the room, nor there are heating and cooling, I don't know what can cause such an increase in the temperature of the room, are solar gains really that much increasing the mean temperature of the zone?