I doubt that any one method for cooling your trailer will be entirely satisfactory by itself. I have both a Fantastic-Fan (with a separate Rain Cover
) and a 5000 BTU air conditioner
. I am now contemplating adding
an RV Evaporative Air (Swamp) Cooler
to what I already have. What works in Bandon, Oregon
may not be adequate in Quartzsite, Arizona
; which is useless in Hot Springs, Arkansas
. As I have camped in all 3 places, I have discovered that what works well in one place doesn't necessarily work well in another.
When it's up to 85 degrees or so in the shade, simple air movement works well. This is when a Fantastic-Fan
is ideal. It runs on 12 Volts DC just like your lights
, so it runs anywhere with battery
power. It's reversible, so you can exhaust hot air, or bring cooler air inside.
Air Conditioning's physics create cool air by dehumidifying moving air. If it's hot and humid, this is what you want to use. But A/C is a closed system, and it needs all vents and windows
closed to work. When it gets too hot when it's dry, there isn't enough moisture to wring out of the air, and lower BTU A/Cs cannot keep up, higher BTU A/Cs have diminishing returns. Compressors' power needs are another drawback; A/Cs need 110 volts with high current draw. Without hook-ups, that means a generator
Evaporative Cooling's physics is just the opposite; it creates cool air by ADDING humidity! This is important in a Desert climate, where Evaporative Coolers are more plentiful than Air Conditioners. They are an open system, needing to circulate air from outside to inside and back out again. They are cheaper to run being made up of a fan, water pump, and a porous material that is kept wet. Fan motors and water pumps do not have a high current draw, so they do work off just a 12 volt battery
. Their drawback is that they don't work in high humidity, they just make everything damp, which may be how they got their nickname: "Swamp Cooler."
My friends who live in Palm Springs, California experience wide swings in temperature and humidity. They have Air Conditioners and
Evaporative Coolers and
Ceiling Fans. I plan to emulate them.