DannyB1954 said:
I prefer the Maxx Air brand over the Fantastic. You can open it in the rain because it has a built in cover. With the Fantastic brand, you have to buy a separate cover and it is a bit large.
+1
A fan is the combined "AC Unit, Ceiling Fan, Kitchen Exhaust Fan and possibly Bathroom Exhaust Fan" of your build.
The Maxx Air more than any other feature except maybe the bed makes my van a home on wheels.
In addition to being able to leave it open in the rain AND while driving down the road where it acts as a passive vent at the back of a vehicle, other factors I like are...
Reversibility (exhaust or intake)
10 speeds (from silent running to B52 taking off), so you can set to sound volume, air volume and battery power usage you prefer.
Can run with vent closed to act as a ceiling fan.
Remote control
Power open/close
Not much taller than a standard vent when closed.
Thermostat setting to turn fan on at a given temp to exhaust heat, shut off when desired temp returns.
I've used all of these features extensively this summer and they make the difference between "bearable" and "comfortable."
The 10 speeds are very useful,
[font=Tahoma, Verdana, Arial, sans-serif]I have[/font][font=Tahoma, Verdana, Arial, sans-serif] run the MaxxAir all night up to speed 3 and was still able to [/font][font=Tahoma, Verdana, Arial, sans-serif]start the vehicle at night before I had the house battery system wired.[/font] According to the below review, the Fantastic falls somewhere in the middle of the Maxx Air range in both amp draw and air flow. So with the Maxx air you get greater range to go quieter or draw much more air.
http://www.wanderthewest.com/forum/...an-vs-maxxfan-comparison-including-amp-usage/
If I get dirty/sweaty during the day riding motorcycles or working around camp, it is nice to be able to reach into van door and hit remote to start exhausting hot air without having to climb into van and up onto the bed to open and start the fan.
The ceiling fan feature with vent closed is also nice in temperate to cool climates. Sometimes it is too chilly at night to draw air in, but sleeping beside someone is a little too warm. The ceiling fan mode generates some airflow to keep things comfortable.
You can drive with the MaxxFan open and off to act as a passive exhaust vent, so air flows from vents or open windows through the van and out. You can skip AC to get a little bit better fuel economy on borderline hot days on the road.