Motor In Airstream fraction is acting weird
Found a weird thing with the Mortor in Airstream fraction that is input for Fans in OpenStudio. From what i understand, when the value is 0, it should not provide any heat to the airstream. But that is not the case, which made me wonder if something is wrong when it translated into the idf file.
I also noticed that there is a small difference between setting it to 1 or 0. But it still gain some heat from the fan, so is that cause by something else? The two examples are shown in the figures below:
Motor In Airstream Fraction = 0.0
Motor In Airstream Fraction = 1.0
The HVAC system used:
Hope someone can enlighten me :)