So I just received my polymaker polydryer yesterday, and coming from an eibos cyclopes, this thing is crazy weak. It's been going for 2 hours now on setting level 2 and hasn't gone above 44c. My eibos cyclopes with 2 rolls and a lid riser, so the volume of air is greatly increased hits about 4c below its set temperature within 25 minutes, and that's about 8 inches from the heat source. I have an very nice thermometer with a k type thermocouple for commercial food preparation/safety, and it gets calibrated monthly, ( I own a Cafe).

I also did a very crude test of the airflow. The back port is the heat outlet, the front is the inlet feeding air to the ptc heater. It barely feels like it's moving any air, and maybe someone can repeat this test, if you have the manual for the polydryer, open the first page,(cover) and put it against the hot air outlet. Mine won't even push the page up. For how much noise this thing makes it has zero excuses for moving this little air. I built a chamber heater for my P1S, and it's barely louder but moves a crazy amount of air and heat.

Of the the reasons I got this was because I print a ton of tpu, mostly for fpv drones I build, and I wanted to be able to print while it drys, but my eibos cyclopes dual filament rollers aren't very smooth, and create a lot of resistance, which for tpu can lead to under extrusion. The axial rotation feature in the polydryer creates much less drag, and being able to seal it up when it's done sounded like a nice convenience, but if it can't even get to 50c air temp at setting 2, I don't have a lot of confidence in it's abilty to dry this pa6 cf I just picked up.

Would love to hear if anyone has had a similar experience, or if their unit tests better than mine. 

I see a lot of positive feedback on the Polymaker Polydryer, but mine is garbage.