Round air vent grill 3D models

First model: 2025-07-26

Number of 3D models generated: 455

Category: technical parts

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Photos of various 3D printed models

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 vertical positioning of the flats.

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Keywords: air vent, ventilation grille, air outlet, ventilation outlet, round air outlet, circular air vent, airflow grille, air intake vent, exhaust vent, vent

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	name	unit	Value	Weight
#1	male diameter 50 to 300 - up to 1 decimal place	mm
#2	slat angle 10 to 60 - integer	°
#3	slat thickness 1.4 to 2.4 - up to 1 decimal place	mm
#4	flange width 0 to 20 - integer	mm
#5	central reinforcement		-	-
			Search

Additional information

See template revisions

• 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.
  

See 3d modeling details

• 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

Categories

Round air vent grill
Male diameter
50 to 100 mm

Round air vent grill
Male diameter
100 to 150 mm

Round air vent grill
Male diameter
150 to 200 mm

Round air vent grill
Male diameter
200 to 250 mm

Round air vent grill
Male diameter
250 mm and over

The latest online-generated models

Round air vent STL 3D file ∅ 125 mm, slat angle: 45° with central reinforcement (📦 #13311)

1 object(s) - format STL

Model of a round air vent for ventilation in STL format. Its insertion diameter measures 125 mm. The slats have an angle of 45° and a low thickness of 1.5 mm. A centered vertical reinforcement strengthens the slats. This 3D aeration grille features a flange of 8 mm. The total diameter of the model is 141 mm.

Parameter	Value	Unit
male diameter	125	mm
slat angle	45	°
slat thickness	1.5	mm
flange width	8	mm
central reinforcement	yes

Round air vent STL file ∅ 125 mm, slat angle: 10° with central reinforcement (📦 #13310)

1 object(s) - format STL

Design of a round air vent for air circulation in STL format. Its insertion diameter measures 125 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. A central reinforcement reinforces the slats. This 3D vent grille features a collar of 8 mm. The full diameter of this model is 141 mm.

Parameter	Value	Unit
male diameter	125	mm
slat angle	10	°
slat thickness	2	mm
flange width	8	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 103 mm, slat angle: 45° with central reinforcement (📦 #13188)

1 object(s) - format STL

3D model of a round air vent for ventilation in STL format. Its insertion diameter is 103 mm. The slats have an angle of 45° and a high thickness of 2 mm. A vertical reinforcement secures the slats. This vent grille has no flange.

Parameter	Value	Unit
male diameter	103	mm
slat angle	45	°
slat thickness	2	mm
flange width	0	mm
central reinforcement	yes

Round air vent STL file ∅ 52.9 mm, slat angle: 45° (📦 #13128)

1 object(s) - format STL

Model of a round air vent for ventilation in STL format. Its male diameter is 52.9 mm. The slats have an angle of 45° and a high thickness of 1.8 mm. This vent cover features a thin flange of 4 mm. The total diameter of this model is 60.9 mm.

Parameter	Value	Unit
male diameter	52.9	mm
slat angle	45	°
slat thickness	1.8	mm
flange width	4	mm
central reinforcement	no

Round air vent STL 3D file ∅ 200 mm, slat angle: 10° with central reinforcement (📦 #13046)

1 object(s) - format STL

Model of a round vent cover for air circulation in STL format. Its insertion diameter is 200 mm. The slats have a slight angle of 10° and a high thickness of 1.8 mm. A vertical reinforcement strengthens the whole structure. This 3D vent grille has a prominent flange of 15 mm. The overall diameter of this model is 230 mm.

Parameter	Value	Unit
male diameter	200	mm
slat angle	10	°
slat thickness	1.8	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 114 mm, slat angle: 45° with central reinforcement (📦 #12978)

1 object(s) - format STL

Design of a round vent cover for ventilation in STL format. Its insertion diameter is 114 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A central reinforcement secures the whole structure. This 3D vent cover features a prominent flange of 13 mm. The full diameter of the model is 140 mm.

Parameter	Value	Unit
male diameter	114	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	13	mm
central reinforcement	yes

Round air vent STL file ∅ 100 mm, slat angle: 30° with central reinforcement (📦 #12717)

1 object(s) - format STL

Design of a round grille for ventilation in STL format. Its male diameter measures 100 mm. The slats have a slight angle of 30° and a high thickness of 2.4 mm. A vertical reinforcement secures the whole structure. This 3D aeration grille features a prominent flange of 20 mm. The total diameter of the model is 140 mm.

Parameter	Value	Unit
male diameter	100	mm
slat angle	30	°
slat thickness	2.4	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL file ∅ 125 mm, slat angle: 20° (📦 #12454)

1 object(s) - format STL

3D model of a round air vent for ventilation in STL format. Its insertion diameter measures 125 mm. The slats have a slight angle of 20° and a low thickness of 1.5 mm. This vent cover features a prominent flange of 20 mm. The overall diameter of the model is 165 mm.

Parameter	Value	Unit
male diameter	125	mm
slat angle	20	°
slat thickness	1.5	mm
flange width	20	mm
central reinforcement	no

Round air vent STL 3D file ∅ 206 mm, slat angle: 30° (📦 #12401)

1 object(s) - format STL

Design of a round grille for ventilation in STL format. Its male diameter is 206 mm. The slats have a slight angle of 30° and a high thickness of 2.4 mm. This vent grille features no flange.

Parameter	Value	Unit
male diameter	206	mm
slat angle	30	°
slat thickness	2.4	mm
flange width	0	mm
central reinforcement	no

Round air vent STL 3D file ∅ 206 mm, slat angle: 60° (📦 #12400)

1 object(s) - format STL

File of a round air vent for ventilation in STL format. Its male diameter is 206 mm. The slats have a steep angle of 60° and a high thickness of 2.4 mm. This vent cover has no flange.

Parameter	Value	Unit
male diameter	206	mm
slat angle	60	°
slat thickness	2.4	mm
flange width	0	mm
central reinforcement	no

Round air vent STL 3D file ∅ 206 mm, slat angle: 10° with central reinforcement (📦 #12398)

1 object(s) - format STL

3D model of a round air vent for ventilation in STL format. Its insertion diameter is 206 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. A central reinforcement reinforces the whole structure. This aeration grille has no flange.

Parameter	Value	Unit
male diameter	206	mm
slat angle	10	°
slat thickness	2	mm
flange width	0	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 51 mm, slat angle: 60° (📦 #12381)

1 object(s) - format STL

Design of a round grille for ventilation in STL format. Its male diameter is 51 mm. The slats have a steep angle of 60° and a low thickness of 1.4 mm. This 3D aeration grille features a thin flange of 5 mm. The total diameter of this model is 61 mm.

Parameter	Value	Unit
male diameter	51	mm
slat angle	60	°
slat thickness	1.4	mm
flange width	5	mm
central reinforcement	no

Round air vent STL 3D file ∅ 160 mm, slat angle: 35° with central reinforcement (📦 #12359)

1 object(s) - format STL

3D design of a round grille for ventilation in STL format. Its insertion diameter measures 160 mm. The slats have an angle of 35° and a high thickness of 2 mm. A vertical reinforcement reinforces the slats. This ventilation grille features a flange of 10 mm. The overall diameter of this model is 180 mm.

Parameter	Value	Unit
male diameter	160	mm
slat angle	35	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 188 mm, slat angle: 45° with central reinforcement (📦 #12345)

1 object(s) - format STL

3D model of a round grille for air circulation in STL format. Its insertion diameter is 188 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A vertical reinforcement strengthens the whole structure. This 3D aeration grille features a thin flange of 5 mm. The full diameter of this model is 198 mm.

Parameter	Value	Unit
male diameter	188	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL file ∅ 160 mm, slat angle: 35° with central reinforcement (📦 #12334)

1 object(s) - format STL

Model of a round grille for ventilation in STL format. Its male diameter is 160 mm. The slats have an angle of 35° and a low thickness of 1.6 mm. A central reinforcement strengthens the whole structure. This 3D vent grille features a flange of 10 mm. The total diameter of the model is 180 mm.

Parameter	Value	Unit
male diameter	160	mm
slat angle	35	°
slat thickness	1.6	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 78 mm, slat angle: 10° with central reinforcement (📦 #12252)

1 object(s) - format STL

3D model of a round vent cover for air circulation in STL format. Its male diameter is 78 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. A vertical reinforcement strengthens the slats. This vent cover features a prominent flange of 20 mm. The total diameter of this model is 118 mm.

Parameter	Value	Unit
male diameter	78	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 100 mm, slat angle: 15° with central reinforcement (📦 #12204)

1 object(s) - format STL

3D model of a round air vent for air circulation in STL format. Its male diameter measures 100 mm. The slats have a slight angle of 15° and a low thickness of 1.6 mm. A vertical reinforcement reinforces the whole structure. This 3D aeration grille features a thin flange of 5 mm. The full diameter of this model is 110 mm.

Parameter	Value	Unit
male diameter	100	mm
slat angle	15	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 148 mm, slat angle: 45° with central reinforcement (📦 #12097)

1 object(s) - format STL

3D file of a round grille for air circulation in STL format. Its insertion diameter is 148 mm. The slats have an angle of 45° and a high thickness of 2.3 mm. A vertical reinforcement reinforces the slats. This 3D ventilation grille features a prominent flange of 15 mm. The full diameter of the model is 178 mm.

Parameter	Value	Unit
male diameter	148	mm
slat angle	45	°
slat thickness	2.3	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 60 mm, slat angle: 10° with central reinforcement (📦 #12096)

1 object(s) - format STL

Model of a round vent cover for air circulation in STL format. Its male diameter measures 60 mm. The slats have a slight angle of 10° and a high thickness of 2.4 mm. A vertical reinforcement strengthens the slats. This 3D ventilation grille features a prominent flange of 15 mm. The overall diameter of this model is 90 mm.

Parameter	Value	Unit
male diameter	60	mm
slat angle	10	°
slat thickness	2.4	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL file ∅ 103 mm, slat angle: 50° with central reinforcement (📦 #12022)

1 object(s) - format STL

Model of a round vent cover for ventilation in STL format. Its insertion diameter measures 103 mm. The slats have a steep angle of 50° and a low thickness of 1.4 mm. A vertical reinforcement strengthens the whole structure. This 3D aeration grille has a thin flange of 3 mm. The overall diameter of the model is 109 mm.

Parameter	Value	Unit
male diameter	103	mm
slat angle	50	°
slat thickness	1.4	mm
flange width	3	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 104 mm, slat angle: 40° with central reinforcement (📦 #12021)

1 object(s) - format STL

Model of a round grille for ventilation in STL format. Its insertion diameter is 104 mm. The slats have an angle of 40° and a low thickness of 1.5 mm. A vertical reinforcement secures the slats. This ventilation grille features a thin flange of 3 mm. The total diameter of this model is 110 mm.

Parameter	Value	Unit
male diameter	104	mm
slat angle	40	°
slat thickness	1.5	mm
flange width	3	mm
central reinforcement	yes

Round air vent STL file ∅ 104 mm, slat angle: 60° with central reinforcement (📦 #12020)

1 object(s) - format STL

Model of a round vent cover for air circulation in STL format. Its male diameter measures 104 mm. The slats have a steep angle of 60° and a low thickness of 1.5 mm. A central reinforcement strengthens the slats. This 3D vent cover has a thin flange of 3 mm. The total diameter of the model is 110 mm.

Parameter	Value	Unit
male diameter	104	mm
slat angle	60	°
slat thickness	1.5	mm
flange width	3	mm
central reinforcement	yes

Round air vent STL file ∅ 104 mm, slat angle: 10° with central reinforcement (📦 #12019)

1 object(s) - format STL

File of a round vent cover for ventilation in STL format. Its insertion diameter measures 104 mm. The slats have a slight angle of 10° and a low thickness of 1.5 mm. A central reinforcement reinforces the whole structure. This 3D aeration grille features a thin flange of 3 mm. The total diameter of the model is 110 mm.

Parameter	Value	Unit
male diameter	104	mm
slat angle	10	°
slat thickness	1.5	mm
flange width	3	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 71 mm, slat angle: 10° (📦 #11936)

1 object(s) - format STL

3D model of a round air vent for air circulation in STL format. Its insertion diameter measures 71 mm. The slats have a slight angle of 10° and a low thickness of 1.4 mm. This 3D vent cover features a prominent flange of 16 mm. The overall diameter of the model is 103 mm.

Parameter	Value	Unit
male diameter	71	mm
slat angle	10	°
slat thickness	1.4	mm
flange width	16	mm
central reinforcement	no

Round air vent STL 3D file ∅ 71 mm, slat angle: 10° with central reinforcement (📦 #11892)

1 object(s) - format STL

Model of a round vent cover for air circulation in STL format. Its insertion diameter is 71 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. A central reinforcement secures the whole structure. This 3D ventilation grille has a prominent flange of 15 mm. The full diameter of the model is 101 mm.

Parameter	Value	Unit
male diameter	71	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 80 mm, slat angle: 45° with central reinforcement (📦 #11849)

1 object(s) - format STL

3D file of a round air vent for air circulation in STL format. Its insertion diameter is 80 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A vertical reinforcement secures the slats. This ventilation grille has a thin flange of 5 mm. The full diameter of the model is 90 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL file ∅ 90 mm, slat angle: 45° with central reinforcement (📦 #11848)

1 object(s) - format STL

3D design of a round air vent for ventilation in STL format. Its insertion diameter is 90 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A vertical reinforcement reinforces the whole structure. This vent cover features a thin flange of 5 mm. The full diameter of this model is 100 mm.

Parameter	Value	Unit
male diameter	90	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL file ∅ 86 mm, slat angle: 30° (📦 #11676)

1 object(s) - format STL

3D file of a round vent cover for ventilation in STL format. Its male diameter measures 86 mm. The slats have a slight angle of 30° and a low thickness of 1.6 mm. This 3D ventilation grille features a thin flange of 5 mm. The full diameter of this model is 96 mm.

Parameter	Value	Unit
male diameter	86	mm
slat angle	30	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 85 mm, slat angle: 30° (📦 #11662)

1 object(s) - format STL

Model of a round vent cover for ventilation in STL format. Its insertion diameter measures 85 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. The total diameter of the model is 95 mm.

Parameter	Value	Unit
male diameter	85	mm
slat angle	30	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 90 mm, slat angle: 45° with central reinforcement (📦 #11659)

1 object(s) - format STL

Design of a round air vent for air circulation in STL format. Its male diameter is 90 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A centered vertical reinforcement secures the slats. This 3D aeration grille has a collar of 10 mm. The total diameter of this model is 110 mm.

Parameter	Value	Unit
male diameter	90	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	10	mm
central reinforcement	yes

3D-printable round vent covers

Round vent covers promote smooth air circulation while providing effective mechanical protection against splashes or weather exposure. They also act as a physical barrier. 3D-printable in various diameters and fin angles, these models can be adapted to the desired airflow and installation context. Their precise design ensures a balanced combination of airflow, rigidity, and durability.

For compact setups, a small-diameter vent cover offers a discreet and efficient solution, while a large-diameter vent cover is ideal for applications requiring stronger airflow or wider ventilation. Some designs include a central reinforcement to improve rigidity without restricting air passage.

The slat profile directly affects airflow behavior: a low-angle fin vent cover allows maximum air passage, while a 60° fin vent cover slows the flow slightly but offers better protection against splashes and direct contact.

These 3D-printed ventilation covers stand out for their balance of functionality and strength, making them easy to integrate into any ventilation or cooling project.