Round air vent grill
Number of 3D models generated: 18
Category: technical parts
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(model #1299)
Photos of some models once 3D printed
This template generates round ventilation grilles, also known as circular air vents.
The main parameter is the male insertion diameter. It corresponds to the inner diameter of the tube that will receive the air vent.
You can choose the angle of the slats, from 10° to 60°. 45° is a good compromise. If you choose a lower angle, airflow will be improved. If you choose a higher angle, protection against bad weather (rain) will be better.
The thickness of the slats and the width of the flange are also configurable. You can also choose whether or not to include a central reinforcement, which is particularly useful for large diameters and/or thin slat thicknesses.
The main advantage of this template is that it generates slats that never overlap regardless of the chosen angle (which optimizes airflow), while still ensuring near opacity along the axis.
Rounded edges (fillets) make it easier to insert the vent into the tube and improve airflow around the slats and the central reinforcement, where applicable.
Finally, aesthetics are also taken into account with optimized slat positioning.
Keywords: air vent, ventilation grille, air outlet, ventilation outlet, round air outlet, circular air vent, airflow grille, air intake vent, exhaust vent, vent
Customizable parameters
| name | unit | |
|---|---|---|
| #1 | male diameter | mm |
| #2 | slat angle | ° |
| #3 | slat thickness | mm |
| #4 | flange width | mm |
| #5 | central reinforcement |
Additional information
-
2025-07-30 (last model before revision: #1298) :
Fillet on the slats and the central reinforcement, if present, have been updated from 0.4 to 0.3.
-
2025-07-26 (last model before revision: #1264) :
Fillets on the insertion side have been updated from 0.8 to 1.0.
- The total thickness of the vent is 25 mm.
- Whatever the parameters, the slats never overlap. This ensures an optimal airflow. At the same time, the slats form an almost opaque screen along the axis.
- The slats are actually shaped as parallelograms rather than rectangles. This ensures better printability.
- The slats and the central reinforcement (if present) feature a 0.40 mm fillet on all edges. This improves airflow and prevents potential whistling.
- The collar, if present, is 3 mm thick and has a 2 mm fillet for aesthetic purposes.
- The male insertion area is 3 mm thick and has a 1 mm fillet on both edges to facilitate insertion into the intended slot.
- The central reinforcement, if present, is 2 mm thick and spans the entire projected width of the slats.
Illustration of the parameters
Model search
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On-demand generation is available for this template. If the model does not exist, on-demand generation will be offered.
Latest models generated using this template
Design of a round vent cover for ventilation in STL format. Its insertion diameter measures 85 mm. The slats have an angle of 35° and a high thickness of 1.8 mm. This 3D aeration grille features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 85 | mm |
| slat angle | 35 | ° |
| slat thickness | 1.8 | mm |
| flange width | 5 | mm |
| central reinforcement | 0 |
📦 3D model #1298
1 object(s) - format STL
File of a round air vent for ventilation in STL format. Its male diameter measures 152 mm. The slats have a steep angle of 50° and a high thickness of 2 mm. A centered vertical reinforcement secures the whole structure. This ventilation grille has a thin flange of 3 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 152 | mm |
| slat angle | 50 | ° |
| slat thickness | 2 | mm |
| flange width | 3 | mm |
| central reinforcement | 1 |
📦 3D model #1296
1 object(s) - format STL
File of a round vent cover for air circulation in STL format. Its male diameter measures 140 mm. The slats have a slight angle of 15° and a low thickness of 1.6 mm. A vertical reinforcement secures the whole structure. This ventilation grille has a collar of 6 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 140 | mm |
| slat angle | 15 | ° |
| slat thickness | 1.6 | mm |
| flange width | 6 | mm |
| central reinforcement | 1 |
📦 3D model #1293
1 object(s) - format STL
3D file of a round grille for ventilation in STL format. Its insertion diameter is 152 mm. The slats have an angle of 45° and a high thickness of 2 mm. A vertical reinforcement secures the whole structure. This 3D vent cover has a thin flange of 3 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 152 | mm |
| slat angle | 45 | ° |
| slat thickness | 2 | mm |
| flange width | 3 | mm |
| central reinforcement | 1 |
File of a round air vent for air circulation in STL format. Its insertion diameter is 90 mm. The slats have an angle of 35° and a low thickness of 1.6 mm. This vent cover has no flange.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 90 | mm |
| slat angle | 35 | ° |
| slat thickness | 1.6 | mm |
| flange width | 0 | mm |
| central reinforcement | 0 |
Design of a round grille for air circulation in STL format. Its insertion diameter is 150 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. This vent cover features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 150 | mm |
| slat angle | 45 | ° |
| slat thickness | 1.6 | mm |
| flange width | 5 | mm |
| central reinforcement | 0 |
📦 3D model #1286
1 object(s) - format STL
File of a round grille for ventilation in STL format. Its male diameter measures 300 mm. The slats have a slight angle of 30° and a high thickness of 2.4 mm. A central reinforcement reinforces the slats. This 3D aeration grille features a collar of 10 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 300 | mm |
| slat angle | 30 | ° |
| slat thickness | 2.4 | mm |
| flange width | 10 | mm |
| central reinforcement | 1 |
📦 3D model #1285
1 object(s) - format STL
File of a round vent cover for air circulation in STL format. Its insertion diameter measures 300 mm. The slats have a steep angle of 60° and a high thickness of 2.4 mm. A vertical reinforcement secures the whole structure. This aeration grille features a flange of 10 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 300 | mm |
| slat angle | 60 | ° |
| slat thickness | 2.4 | mm |
| flange width | 10 | mm |
| central reinforcement | 1 |
Model of a round vent cover for air circulation in STL format. Its insertion diameter is 85 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. This vent grille has a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 85 | mm |
| slat angle | 45 | ° |
| slat thickness | 1.6 | mm |
| flange width | 5 | mm |
| central reinforcement | 0 |
📦 3D model #1282
1 object(s) - format STL
3D file of a round air vent for ventilation in STL format. Its insertion diameter is 70 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A centered vertical reinforcement reinforces the slats. This 3D vent grille features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 70 | mm |
| slat angle | 45 | ° |
| slat thickness | 1.6 | mm |
| flange width | 5 | mm |
| central reinforcement | 1 |
📦 3D model #1281
1 object(s) - format STL
3D file of a round vent cover for ventilation in STL format. Its male diameter measures 150 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. A central reinforcement strengthens the whole structure. This 3D ventilation grille features a collar of 10 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 150 | mm |
| slat angle | 10 | ° |
| slat thickness | 2 | mm |
| flange width | 10 | mm |
| central reinforcement | 1 |
3D file of a round grille for air circulation in STL format. Its insertion diameter measures 71.5 mm. The slats have an angle of 40° and a low thickness of 1.4 mm. This vent cover features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 71.5 | mm |
| slat angle | 40 | ° |
| slat thickness | 1.4 | mm |
| flange width | 5 | mm |
| central reinforcement | 0 |
3D model of a round air vent for air circulation in STL format. Its male diameter is 93.6 mm. The slats have a slight angle of 30° and a low thickness of 1.6 mm. This 3D vent grille has a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 93.6 | mm |
| slat angle | 30 | ° |
| slat thickness | 1.6 | mm |
| flange width | 5 | mm |
| central reinforcement | 0 |
3D design of a round grille for ventilation in STL format. Its male diameter measures 96 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. This 3D aeration grille features a flange of 10 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 96 | mm |
| slat angle | 10 | ° |
| slat thickness | 1.6 | mm |
| flange width | 10 | mm |
| central reinforcement | 0 |
📦 3D model #1267
1 object(s) - format STL
Model of a round vent cover for ventilation in STL format. Its male diameter measures 50 mm. The slats have a steep angle of 60° and a high thickness of 2.4 mm. A central reinforcement reinforces the slats. This 3D aeration grille features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 50 | mm |
| slat angle | 60 | ° |
| slat thickness | 2.4 | mm |
| flange width | 5 | mm |
| central reinforcement | 1 |
📦 3D model #1266
1 object(s) - format STL
3D design of a round vent cover for ventilation in STL format. Its insertion diameter is 100 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. A central reinforcement strengthens the slats. This 3D ventilation grille features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 100 | mm |
| slat angle | 45 | ° |
| slat thickness | 1.4 | mm |
| flange width | 5 | mm |
| central reinforcement | 1 |
📦 3D model #1265
1 object(s) - format STL
Design of a round grille for air circulation in STL format. Its insertion diameter measures 300 mm. The slats have a slight angle of 10° and a low thickness of 1.4 mm. A central reinforcement strengthens the whole structure. This aeration grille has a flange of 10 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 300 | mm |
| slat angle | 10 | ° |
| slat thickness | 1.4 | mm |
| flange width | 10 | mm |
| central reinforcement | 1 |
3D model of a round vent cover for air circulation in STL format. Its insertion diameter measures 80 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. This aeration grille features a thin flange of 5 mm.
| Parameter | Value | Unit |
|---|---|---|
| male diameter | 80 | mm |
| slat angle | 45 | ° |
| slat thickness | 1.6 | mm |
| flange width | 5 | mm |
| central reinforcement | 0 |