Excellent info, Stinky, thanks as always. For ventilation I will have an intake from the neighboring room (just above the floor), and an exhaust with a homemade carbon scrubber in the ceiling (as long as I can figure out how to get the exhaust air to my hot water heater exhaust... they're only around 5 feet apart, but one of the floor joists between them has a circular HVAC vent running all the way through it... I'm debating using a flexible coil, i.e. a clothes dryer exhaust to manuver around the obstacle... any other thoughts?