The Ender 5 PlusPlus and some toasty PETG (#E21F5)
Time flies…
Six months and I think 3 spools of matte PLA later, the Ender 5 Plus is now pretty close to shape I want it to be. There’s a fully custom panelized and gridded bottom section now that carries all electronics above and the 230V input below the 80×40/40×40 extrusion layer. There’s an optimized holder system around (left, right, back) for the 60cm LED panels. There’s stiffening triangles on every corner now, except for the front top extrusion that is moved down a couple centimeters so the bed/nozzle is visible during setup. There’s T-nuts everywhere, fixed in place with grubscrews until I need them – quite a lot of them already carry accessories like spool holders, camera mounts, filament sensor, pliers, spatula, you name it. There’s so much stuff different to a stock Ender 5 Plus and every other printer…but I’m glad I started with a fully working almost-stock Ender that was able to print all the stuff needed to get here.
So, tiny bit of useful information mixed with today’s update: This is how a PETG (I think that still was one of the Geeetech rolls) looks like when it’s used as an A/C outlet adapter…too close to the actual A/C air outlet 
I printed this for work during late summer, when we had a section of our production floor cleaned and sealed for a machine that was intended for cleanroom use. The inside of that chamber got pretty hot, and the 2kW A/C unit that was allowed inside clearly had troubles getting rid of the hot air. No surprised here, since the outlet was like 7 meters away from an outside wall and the ducting wasn’t terribly generous in size. The fan sitting at the very end, tacked onto the brick wall, mainly specialized in generating noise, but didn’t really extract any air. And no hot air out the back of the A/C = no cool air out the front. So we added another more powerful fan in between that took care of moving the air along. Air hose in, PETG adapter, fan, PETG adapter, air hose out.
Guess the 65-ish degrees are just a tiny bit above glass transition temperature of that kind of PETG…
It did the job, though, and kept us all cool(er) inside the cleanroom tent. Next time, however, I’m probably gonna order the part printed in ABS 
Inlet to the extraction hose…
…and close to the outside wall. Clearly lots of heat loss, but still way better than dumping the entire 2kW+ of the A/C unit continuously into the working area that was already pretty toasty. Without any central heating, we never dropped below 20°C in that area during winter, and some folks never stopped wearing shorts for work
Final remark: Here’s the entire Ender light box in action:
Thinking about a drag chain to clean up the wiring, but right now, I’m very satisfied the thing is a) printing pretty well, and b) finally useful for taking photos independently of ambient lighting.
And one more thing: Here’s the STL files for that adapter. Fitting 120mm fans (metal ones preferred, but the hole spacing is identical for fans with plastic housing), here’s the adapter for hoses with ~110mm inner diameter, ~125mm inner diameter, and a fan120_gasket (for printing in TPU, as shown above) that fits both adapters.
