How Well Does The House A/C Work On The Sprinters?

Humidity was not a problem in Arizona. Last year in South Padre Island the heat and humidity did get so high that we ran the air conditioner for a few hours in the afternoon mainly just to dry out the van while we sat outside. Last fall in Kansas it hit 100F with some humidity but not excessive and we slept in the B with the back doors and side door open - screened of course.