Most vans will generally not be airtight and as such will have gaps below the doors etc however a louvered vent can also be installed into the wall of your van to assist with the flow of cool air.
Van roof vent with fan.
Each vent measures 14 square and has a dome which admits light into the cargo area of the van.
The fiamma turbo vent is a great all round option for van life travel.
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With a 12v fan motorised fan the fiamma turbo vent will keep your camper cool and fresh without draining your batteries or using too much power.
The fan tastic vent 807351 is by far one of the most popular vent fans for van dwellers at least van dwellers with a little money to spend.
Rv roof vent fan camper skylights ventilation cover with reversible airflow fan net manual lift dome lid heavy duty easy to install for trailer motorhome windows opening 12 white.
This roof vent has an external measurement of 46x46cm so is a good size even for small campers.
Template for installation and all hardware included.
Van roof vent installs easily with an inner trim ring for a vehicle with rear headliners.
Roof vent fans work by extracting the heat which naturally rises to the top of a van drawing cool air in from below.
Fan tastic vent makes a wide assortment of fans including some that plug into cigarette lighters but if you had to pick only one we d go with the 807350 because it is the most full featured.