You may want to take a look at the Fantastic Fan. Pretty easy install and it does wonders to move air out (or in) of your RV. Installed mine 2 years ago and absolutely love it! Keeps TT cool when needed (open window at other end of TT) and takes any extra smoke or fumes out quickly. Mine has a thermostat....set it and forget it.
2014 Jayflight 24FBS Elite
2009 F150 Supercab, 5.4L ,3.73, HD Tow Package, Equal-i-zer 1K,
Progressive EMS-LCHW30, TST 507RV TPMS, Hydro Life HL-200, Maxxis 8008.
Best friend wife and dog Cooper. RETIRED 6/30/16. WOOHOO! Now the "endless summer" begins.