I have 2 Sunlu S2 dryers, and it is the version with the fan, like @3dsurfr mentioned, you can hear the fan and it sounds like it is placed on the bottom of the dryer under the heater, but I can’t see it.
For people that have the version with the fan, do you find that you need to prop it open a small amount like the older version, or can you keep it closed?
Also, why does nobody suggest drilling a few holes on the sides near the top and bottom instead of propping it open? Is the plastic too brittle to drill into it?
For those interested, here are some useful additions to the Sunlu. A smooth spool roller and PTFE tube attachment.
https://forum.bambulab.com/t/sunlu-filadryer-s2-spool-holder-and-ptfe-adapter/34156?u=simeyesee