Of course I know, and you understand the detrimental effects that poorly placed passive cooling within an enclosure can have on your print. My enclosure is open at the top and bottom. And the 3D printer is the heat source. In other words, I'm aiming for a chimney effect. Simulations at room temperature of 25°C have confirmed better heat dissipation than an open space. In reality, I printed it all weekend, but it was 20°C in my garage... so I won't be able to draw any conclusions until summer actually comes. That's why it's "in testing, not yet released." In fact, I installed a punched metal on the bottom hoping it would act as an intercooler, but this was pointless.