In a 22'er, you may not need two fans....except...what I really like about having two is setting one for exhaust and one reversed for intake. After a hot travel day, this really exchanges the hot air quickly cooling the AS down fast. really helps when dry camping and/or allows the A/C to do it's thing much more quickly.
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-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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