Very true. I'd want enough air changes per hour to keep CO2 and VOCs at reasonable levels. Those numbers can be unique per individual, but I would guess the scupper holes on the bottom (from what I saw during the factory tour) are not really bringing in enough fresh air to improve the air quality.
Curious if anyone has setup an air monitoring device that can detect things like CO2. With two people in an Oliver with everything closed, I imagine it spikes pretty quickly. Sorry I'm getting a little off topic. Dehumidifying the air is great, but I'd encourage folks to think about ventilating too. I think the only way that works is opening windows/vents, which makes dehumidifying harder. I wonder if the dehumidifiers can keep up once you open a window/vent. Another option would be to keep everything closed, but every hour (or some interval) open windows/vents to get a load of fresh air to sustain until next time (obviously this won't work while sleeping).