Keeping Cool
Most van campers come with a rooftop air conditioner, but keeping cool in hot weather -- especially in direct sunlight -- can still be tricky when you're in a metal box with windows. Here's how you stay cool.
Hot Weather Camping
Finding shade for the van is the most effective way to minimize the greenhouse effect, although doing so diminishes the utility of your solar panels. You can also try to use your awning strategically (if you have one). Beyond that, the following tips and devices should keep you comfortable in all but the hottest conditions.
Air Conditioners
Almost every van camper on the market comes with a 110v "house" a/c that requires either shore power or an inverter to run. These units work well, but most are quite loud and they all use lots of power. The Truma Aventa and RecPro Houghton units are noticeably quieter, as are 12v units for those interested in upgrading. But in general, van owners try to avoid using the a/c whenever possible.
Roof Vent Fans
Except for pop-top van campers that have an a/c, every van camper will have a remote controlled roof vent fan complete with a rain sensor that will shut it down if it rains. The nicest units have shrouds that allow it to operate in the rain. These little powerhouses sip power but can move a tremendous amount of air, especially with a window cracked. Unless it's very humid and hot outside, many van owners get by with just a roof vent fan.
Reflectix on Windows
When in direct sun, windows turn a van into a greenhouse. The blackout shades that come with van campers can be helpful, but it's more effective to use pieces of Reflectix in every window opening. Reflectix is a highly reflective insulation material that "bounces" solar radiation away from the interior.
Fans
Most people use fans inside the van. Rechargeable battery operated fans are popular and inexpensive. A permanently installed 12v fan by Sirocco is another popular option.
Insulation
Another important factor is insulation. Your van camper may or may not be well insulated (especially the doors), and that can have a huge impact on temperature regulation. Improving the van's insulation is a relatively complicated DIY project, but it's possible.