Hi btcruzer,
I chose to put the fans in a mask at the top of the "chimney" so they suck air. I did not change the baffles but I probably should. The biggest difference I got was in initial cool down time which dropped from 12 hours to 6 hours. Duty cycle, after cool down, remained identical at 2:3 (40 minutes on for every hour).
One reason I did this was to allow for low temperature operations. I wanted to actually restrict the air flow, to some small extent.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.