Quote Originally Posted by Sadasius View Post
It's the temp difference of your ambient air to the temperature of your water. Basically take the temp of your room and subtract the temp of your water will give you your delta. Taking the ambient of your case if your using that air through the rad may be a good calculation to do. Basically wherever your taking the air from is your air temp.
Quote Originally Posted by MpG View Post
Ultimately, it's the temperature of the air that's actually entering the radiator. If the air first heats up from entering the case, that will directly affect your water temperature.
Ok that's what I thought but wanted to make sure. In my case, I intake air into my case which is then exhausted out over the radiators so the temperature of my room is not my ambient temperature since the air heats up inside the case before it hits the radiator. Thanks guys.