Description
I changed the original design for a more close box with 2 fan for air flow I used a original board fan for ender 3 ( link below), install pushing air out and connected on the 24v main source with a voltage regulator (we don't need at full power and less noises)

fan that I used
ender 3 4010 fan

https://www.amazon.ca/Ender-3-Extruder-Cooling-Brushless-40x40x10mm/dp/B087R9TCH4/ref=sr_1_7?crid=TEKQO7BWL942&keywords=Creality+Ender+3+Original+4010+Fan&qid=1684728704&s=industrial&sprefix=creality+ender+3+original+4010+fan%2Cindustrial%2C86&sr=1-7