add vent hose adapter mod

README.md

@@ -60,6 +60,7 @@ like so:
 | jurisv      | [SLA CPAP Trihorn](./jurisv/sla_cpap_trihorn)                             | CPAP Trihorn Fan ducts for SLA printers as single piece          | ✔️ | ✖️ | :green_heart: |
 | karnadi    | [NF Crazy front face](./karnadi/NF_Crazy_2510_BLTouch) | NF Crazy front face 2510 fan with BLTouch mount | ✔️ | ✔️ | :green_heart: |
 |            | [VzHextrudort pneumatic coupler](./karnadi/VzHextrudort_pneumatic_coupler) | VzHextrudort pneumatic PTFE coupler | ✔️ | ✔️ | :green_heart: |
+| keefo      | [vent hose adapter](./keefo/vent_hose_adapter) | vent hose adapter | ✔️ | ✖️ | :green_heart: |
 | knarfie    | [12mm Linear Rod](./knarfie/12mm_rods) | Mod for 12mm linear rods | ✔️ | ✖️ | :green_heart: |
 |            | [Idler Shoulder](./knarfie/shoulder_idler) | Idler mounts with spots for shoulder bolts  | ✔️ | ✖️ | :green_heart: |
 |            | [Trihorn](./knarfie/trihorn_duct) | Trihorn duct for the VZ Printhead | ✔️ | ✔️ | :green_heart: |

keefo/vent_hose_adapter/README.md

@@ -0,0 +1,20 @@
+this adapter can install on the outside of the vzbot exhaust filter, to connect a 3inch vent hose.
+
+BOM:
+
+1. M3x30mm screws x 4. (vzbot offical doc use 25mm M3 here)
+2. A 3 inch flexible vent hose, length based on your needs. Like this one on amazon: https://a.co/d/2pFttcT
+
+Print with:
+* 0.2mm layer height. 
+* with support, 
+* 15%~30% infill.
+* Nice to print it in ABS, PLA also works.
+
+If you use this hose, you can remove the hepa filter to increase the air flow. You can save some money on buying hepa filter.  
+
+I kept the activated carbon vent filter in to prevent bugs coming.
+
+Showcase:
+
+![image](images/IMG_5074.jpg)