Just a little extra info;
I installed a MaxxFan in the living room area. It has a variable automatic speed setting that is very convenient. Its set at 78 degrees (but can be raised or lowered) and the fan runs higher or lower to adjust to that temp. At the lowest setting it is much quieter than the FantasticFan (I installed one of those in the bathroom) so I run the MaxxFan at night due to the low noise level. The vent operating mechanism is also much more "stout" than the FantasticFan. One useless feature however, is that you can run the fan with the lid closed...that does absolutely nothing. Your comment about the hood vent is right-on...that does virtually nothing to circulating air out of the RV.
2012 Eagle Super Lite HT 26.5RKS
2005 GMC 2500 SLT HD D/A