Mercedes Sprinter: Roof/Ceiling Fan
Photographer and cyclist and Mac expert and software engineer Lloyd Chambers is available for consulting on general Sprinter considerations at his usual consulting rates via phone, or in person in the Palo Alto, CA area. Save yourself hours and mistakes by discussing issues up-front. More about Lloyd....
Windows can provide some ventilation, but a roof/ceiling fan is very important: it can pull air on or blow air out, thus allowing wide flexibility in temperature control under many conditions. A roof fan can also automatically close if it rains, and takes very little power.
The Fantastic Fan @AMAZON is popular, and has now been installed (picture below is before install). It is a must-have for keeping the van cool or pulling outside air into the van.
Shown below, the apparent location for a fan is forward in the cabin (the circular indent at the top of the picture), not far behind the seats. But a better location according to many is near the rear of the van, an idea I support since with windows cracked open the air will be pulled over most of the length of the van interior.
Sprinter owners with the 170-inch wheelbase might wish to install dual fans, one forward and one at the rear. In my view this is overkill for a 144" wheelbase Sprinter.