Chamber heating system with airflow desgined for any 3d printer

Material list:

PTC heater: i use 2x150watt =300watt

https://de.aliexpress.com/item/1005008318909523.html?spm=a2g0o.order_list.order_list_main.22.46685c5fvENVqS&gatewayAdapt=glo2deu

mosfet:

https://de.aliexpress.com/item/1005007050877557.html?spm=a2g0o.order_list.order_list_main.16.46685c5fvENVqS&gatewayAdapt=glo2deu

350watt Power supply: 

https://de.aliexpress.com/item/1005011659679524.html?spm=a2g0o.order_list.order_list_main.28.46685c5fvENVqS&gatewayAdapt=glo2deu

chamber/ ptc thermistor: 

https://de.aliexpress.com/item/1005005988152345.html?spm=a2g0o.order_list.order_list_main.34.46685c5fvENVqS&gatewayAdapt=glo2deu

75mm pipes:

https://de.aliexpress.com/item/1005010422258343.html?spm=a2g0o.order_list.order_list_main.46.46685c5fvENVqS&gatewayAdapt=glo2deu

thermal fuse i recommend 100-120degree:

https://de.aliexpress.com/item/1005007557023197.html?spm=a2g0o.order_list.order_list_main.11.46685c5fvENVqS&gatewayAdapt=glo2deu

Use your favourite print settings i only recommend to print the parts near the ptc heater with abs the other are printed with PETG.

v3 update 31.03.26 

• bether cable management ptc case v3

v2 update: 23.02.2026

• smaller connector pipe convert to from 60mm to 75mm pipe; also a ring seal; bether tolerances for 75mm pipe

• changes on ptc cover smaller cover ; wire entrance and infill changes

• top intake bether tolerances; added a knob and also a ring seal; bether tolerances for 75mm pipe

This is a prototype; further improvements may follow. If you would like to improve anything, please let me know. CAD files are included; remixes are welcome.