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some basic simplified heat transfer equations
highest heat transfer is conduction = Area x thermal conductivity x delta T
convection is next = A x convection coefficient x deltaT
forced convection is ~ 10 times as effective as natural convection
radiation is least effective unless its really hot as it varies by temperature to the 4th power. = emissivity x A x (deltaT)^4, so I would assume it to be negligible at the temperatures we're dealing with.
ya you can feel heat radiating if you put your hand near a radiator, but you would feel it a lot more if the fan was blowing hot air, or I dumped hot coolant on your arm, if you get what I mean.
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