The propensity for condensation to form on the interior surfaces of an rv is a function of 2 factors:
1- The interior relative humidity
2- The temperature of the interior surface
The greater the rh inside the rv, the greater the propensity for condensation to form.
The lower the surface temp inside the rv, the greater the propensity for condensation to form.
Adding heat to the inside of the rv will tend to reduce the formation of condensation by increasing the surface temp inside the rv.
Adding heat to the inside of the rv will tend to reduce the formation of condensation by decreasing the rh.
If outdoor temp is 50 degrees F with rh of 100%, (ie it's raining) and you bring that outdoor air inside the rv where the temp is 70 degrees, the rh will decrease to 49%.
The greater the difference between indoor and outdoor temps, the more dramatic the decrease in rh.
