110cu meter out seems great, you may even try turning off the 75cu meter intake fan (It makes more noise and may not be neccesary) exhausting works well in sealed places, as long as you have a cold air return you shouldn't need the intake since the exhaust is already drawing air through your intake, try it and monitor temps, only running an exhaust may save noise and $$. My veg cab only has an intake (with piped cool air going in) and effectively builds up the pressure forcing it out a smaller exhaust vent (with no fan), just the opposite of what you have, theoreticaly it should work for you in reverse, you'd just have negative pressure.