I've looked into adding a couple of electric radiator fans to the front of my Liberty. 2 of the CA units are behind the front bumper. The grille behind the bumper lets fresh air into the compartment, except when the air operated shutters are closed. Normally, the shutters are open whenever the coach is parked. This seems like a perfect place to mount a couple of radiator fans and a baffle to pressurize the entire compartment and hence the two CA units inside which both exhaust downward.

There is some debate about the purpose of the front shutters and some folks (e.g. Doug at Excalibur) told me that he routinely rips them out altogether. Liberty told me that they were designed to be closed while the coach was in motion to prevent debris from getting into the compartment, and to relieve a situation whereby hot or cold ram air could come into the passenger compartment around the driver's area.

Still, it looks like it would be pretty easy to mount a pair of 12" radiator fans with a cut-out baffle on the inside, behind the shutter assembly. I measured the area and it's a good fit for a pair of them.

I didn't get to start this project but one thing I did notice was that the sealing boot around the steering rod is torn as the rod exits the compartment. It doesn't look easy to replace and so I might suffer some loss of compartment pressurization there.

Overall it looks like a fairly easy project that I may still try next winter when the weather in Arizona is more suited to performing repairs and mods.

Meanwhile, my number 1 problem with running my 4 CA's is the power consumption. With all four of them turned on, it is a near certainty that the 50A breakers in the park pedestal will trip. My inside ammeters are usually reading about 35-40 Amps each in this mode and so we've learned that 2 CA's are safe, 3 are a maybe, and 4 are impossible unless we're running off the generator.

A good workaround has been to install a small portable fan outside that aims into the breaker box, allowing us to be fairly safe on 3 units in hot weather. It's frustrating.