Difference between the Air & Dry Bulb Temp

[TrooperCooper]

Hi All,

Perhaps about to ask a very silly question but I've always been under the impression that the typical air temperature is just the dry resultant temperature.

This has been thrown into chaos however when a question has been asked during a modelling calculation regarding the Global Model Attributes setting in Apache. I cant find much information on changing the Control Temperature Radiant Fraction from Air Temp to Dry Bulb.

I've always changed this as my temperatures within the space then always hit the heating set points in my rooms. Looking back, I should have questioned it more but I'm not finding a lot about it online.

Could someone kindly explain what difference this is making to my model?

Thanks
T