Round air vent grill 3D models

First model: 2025-07-26

Number of 3D models generated: 382

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 file ∅ 119 mm, slat angle: 30° (📦 #10471)

1 object(s) - format STL

Design of a round air vent for ventilation in STL format. Its insertion diameter measures 119 mm. The slats have a slight angle of 30° and a high thickness of 2 mm. This vent cover has a prominent flange of 20 mm. The overall diameter of this model is 159 mm.

Parameter	Value	Unit
male diameter	119	mm
slat angle	30	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	no

Round air vent STL file ∅ 117 mm, slat angle: 30° (📦 #10463)

1 object(s) - format STL

File of a round vent cover for ventilation in STL format. Its insertion diameter is 117 mm. The slats have a slight angle of 30° and a high thickness of 2 mm. This aeration grille has a prominent flange of 20 mm. The full diameter of the model is 157 mm.

Parameter	Value	Unit
male diameter	117	mm
slat angle	30	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	no

Round air vent STL file ∅ 125 mm, slat angle: 30° with central reinforcement (📦 #10455)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its male diameter measures 125 mm. The slats have a slight angle of 30° and a low thickness of 1.6 mm. A vertical reinforcement strengthens the slats. This 3D ventilation grille has a prominent flange of 15 mm. The full diameter of this model is 155 mm.

Parameter	Value	Unit
male diameter	125	mm
slat angle	30	°
slat thickness	1.6	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 78 mm, slat angle: 30° (📦 #10437)

1 object(s) - format STL

3D model of a round air vent for air circulation in STL format. Its male diameter is 78 mm. The slats have a slight angle of 30° and a high thickness of 2.4 mm. This vent cover has a collar of 6 mm. The overall diameter of the model is 90 mm.

Parameter	Value	Unit
male diameter	78	mm
slat angle	30	°
slat thickness	2.4	mm
flange width	6	mm
central reinforcement	no

Round air vent STL file ∅ 95 mm, slat angle: 45° with central reinforcement (📦 #10384)

1 object(s) - format STL

Design of a round grille for ventilation in STL format. Its insertion diameter is 95 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 ventilation grille has a thin flange of 5 mm. The full diameter of the model is 105 mm.

Parameter	Value	Unit
male diameter	95	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL file ∅ 51.5 mm, slat angle: 25° with central reinforcement (📦 #10302)

1 object(s) - format STL

Design of a round vent cover for ventilation in STL format. Its insertion diameter is 51.5 mm. The slats have a slight angle of 25° and a low thickness of 1.6 mm. A vertical reinforcement strengthens the slats. This 3D vent cover features a thin flange of 1 mm. The total diameter of the model is 53.5 mm.

Parameter	Value	Unit
male diameter	51.5	mm
slat angle	25	°
slat thickness	1.6	mm
flange width	1	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 110 mm, slat angle: 15° with central reinforcement (📦 #10283)

1 object(s) - format STL

Model of a round vent cover for ventilation in STL format. Its insertion diameter is 110 mm. The slats have a slight angle of 15° and a high thickness of 2.4 mm. A vertical reinforcement strengthens the slats. This vent cover features a prominent flange of 16 mm. The overall diameter of the model is 142 mm.

Parameter	Value	Unit
male diameter	110	mm
slat angle	15	°
slat thickness	2.4	mm
flange width	16	mm
central reinforcement	yes

Round air vent STL file ∅ 52 mm, slat angle: 35° with central reinforcement (📦 #10274)

1 object(s) - format STL

Design of a round grille for ventilation in STL format. Its male diameter is 52 mm. The slats have an angle of 35° and a low thickness of 1.6 mm. A centered vertical reinforcement strengthens the whole structure. This ventilation grille has a flange of 8 mm. The total diameter of this model is 68 mm.

Parameter	Value	Unit
male diameter	52	mm
slat angle	35	°
slat thickness	1.6	mm
flange width	8	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 126 mm, slat angle: 25° with central reinforcement (📦 #10187)

1 object(s) - format STL

Design of a round vent cover for air circulation in STL format. Its male diameter is 126 mm. The slats have a slight angle of 25° and a low thickness of 1.6 mm. A central reinforcement reinforces the whole structure. This 3D ventilation grille features no flange.

Parameter	Value	Unit
male diameter	126	mm
slat angle	25	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 93 mm, slat angle: 45° with central reinforcement (📦 #10173)

1 object(s) - format STL

Model of a round air vent for air circulation in STL format. Its insertion diameter measures 93 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement strengthens the whole structure. This 3D ventilation grille has a flange of 10 mm. The overall diameter of this model is 113 mm.

Parameter	Value	Unit
male diameter	93	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL file ∅ 145.4 mm, slat angle: 35° with central reinforcement (📦 #10143)

1 object(s) - format STL

3D design of a round air vent for ventilation in STL format. Its insertion diameter is 145.4 mm. The slats have an angle of 35° and a high thickness of 2 mm. A central reinforcement secures the slats. This 3D vent cover features a prominent flange of 20 mm. The full diameter of the model is 185.4 mm.

Parameter	Value	Unit
male diameter	145.4	mm
slat angle	35	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 153.5 mm, slat angle: 45° with central reinforcement (📦 #10140)

1 object(s) - format STL

3D design of a round vent cover for air circulation in STL format. Its insertion diameter measures 153.5 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. A centered vertical reinforcement reinforces the whole structure. This aeration grille has a thin flange of 2 mm. The full diameter of the model is 157.5 mm.

Parameter	Value	Unit
male diameter	153.5	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	2	mm
central reinforcement	yes

Round air vent STL file ∅ 153.5 mm, slat angle: 40° with central reinforcement (📦 #10139)

1 object(s) - format STL

3D model of a round grille for air circulation in STL format. Its insertion diameter measures 153.5 mm. The slats have an angle of 40° and a low thickness of 1.4 mm. A vertical reinforcement reinforces the whole structure. This 3D ventilation grille has a thin flange of 2 mm. The overall diameter of the model is 157.5 mm.

Parameter	Value	Unit
male diameter	153.5	mm
slat angle	40	°
slat thickness	1.4	mm
flange width	2	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 153.5 mm, slat angle: 10° with central reinforcement (📦 #10122)

1 object(s) - format STL

Model of a round air vent for ventilation in STL format. Its male diameter is 153.5 mm. The slats have a slight angle of 10° and a low thickness of 1.4 mm. A vertical reinforcement reinforces the slats. This vent grille features a thin flange of 2 mm. The overall diameter of this model is 157.5 mm.

Parameter	Value	Unit
male diameter	153.5	mm
slat angle	10	°
slat thickness	1.4	mm
flange width	2	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 120 mm, slat angle: 45° with central reinforcement (📦 #10111)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its insertion diameter is 120 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. A central reinforcement reinforces the whole structure. This 3D vent grille has a prominent flange of 12 mm. The overall diameter of the model is 144 mm.

Parameter	Value	Unit
male diameter	120	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	12	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 90 mm, slat angle: 30° (📦 #10046)

1 object(s) - format STL

3D model of a round air vent for air circulation in STL format. Its insertion diameter is 90 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 overall diameter of the model is 100 mm.

Parameter	Value	Unit
male diameter	90	mm
slat angle	30	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	no

Round air vent STL 3D file ∅ 92.5 mm, slat angle: 45° with central reinforcement (📦 #9885)

1 object(s) - format STL

3D design of a round grille for ventilation in STL format. Its insertion diameter is 92.5 mm. The slats have an angle of 45° and a high thickness of 2 mm. A centered vertical reinforcement secures the whole structure. This 3D vent cover features a prominent flange of 20 mm. The full diameter of this model is 132.5 mm.

Parameter	Value	Unit
male diameter	92.5	mm
slat angle	45	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 120.2 mm, slat angle: 30° with central reinforcement (📦 #9831)

1 object(s) - format STL

3D file of a round grille for air circulation in STL format. Its insertion diameter measures 120.2 mm. The slats have a slight angle of 30° and a low thickness of 1.5 mm. A central reinforcement strengthens the slats. This 3D aeration grille has a prominent flange of 20 mm. The total diameter of the model is 160.2 mm.

Parameter	Value	Unit
male diameter	120.2	mm
slat angle	30	°
slat thickness	1.5	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 140 mm, slat angle: 45° with central reinforcement (📦 #9810)

1 object(s) - format STL

3D file of a round grille for ventilation in STL format. Its male diameter is 140 mm. The slats have an angle of 45° and a low thickness of 1.5 mm. A central reinforcement strengthens the slats. This 3D vent cover has a prominent flange of 20 mm. The full diameter of this model is 180 mm.

Parameter	Value	Unit
male diameter	140	mm
slat angle	45	°
slat thickness	1.5	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 79 mm, slat angle: 30° with central reinforcement (📦 #9777)

1 object(s) - format STL

3D file of a round vent cover for ventilation in STL format. Its male diameter is 79 mm. The slats have a slight angle of 30° and a low thickness of 1.5 mm. A centered vertical reinforcement secures the slats. This 3D vent grille features a prominent flange of 15 mm. The overall diameter of the model is 109 mm.

Parameter	Value	Unit
male diameter	79	mm
slat angle	30	°
slat thickness	1.5	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 79.5 mm, slat angle: 45° with central reinforcement (📦 #9768)

1 object(s) - format STL

3D design of a round grille for air circulation in STL format. Its male diameter measures 79.5 mm. The slats have an angle of 45° and a low thickness of 1.5 mm. A vertical reinforcement reinforces the whole structure. This ventilation grille features a prominent flange of 15 mm. The total diameter of the model is 109.5 mm.

Parameter	Value	Unit
male diameter	79.5	mm
slat angle	45	°
slat thickness	1.5	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL file ∅ 50 mm, slat angle: 40° with central reinforcement (📦 #9736)

1 object(s) - format STL

3D design of a round grille for ventilation in STL format. Its insertion diameter is 50 mm. The slats have an angle of 40° and a low thickness of 1.6 mm. A central reinforcement secures the slats. This 3D vent grille has a thin flange of 5 mm. The total diameter of the model is 60 mm.

Parameter	Value	Unit
male diameter	50	mm
slat angle	40	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 85 mm, slat angle: 10° with central reinforcement (📦 #9734)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its male diameter is 85 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. A centered vertical reinforcement reinforces the whole structure. This aeration grille has a prominent flange of 20 mm. The overall diameter of the model is 125 mm.

Parameter	Value	Unit
male diameter	85	mm
slat angle	10	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL file ∅ 150 mm, slat angle: 10° with central reinforcement (📦 #9700)

1 object(s) - format STL

Model 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 low thickness of 1.4 mm. A central reinforcement secures the slats. This 3D vent cover has no flange.

Parameter	Value	Unit
male diameter	150	mm
slat angle	10	°
slat thickness	1.4	mm
flange width	0	mm
central reinforcement	yes

Round air vent STL file ∅ 150 mm, slat angle: 30° with central reinforcement (📦 #9691)

1 object(s) - format STL

Design of a round air vent for ventilation in STL format. Its male diameter is 150 mm. The slats have a slight angle of 30° and a low thickness of 1.4 mm. A central reinforcement strengthens the whole structure. This vent cover features a collar of 10 mm. The total diameter of the model is 170 mm.

Parameter	Value	Unit
male diameter	150	mm
slat angle	30	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL file ∅ 143 mm, slat angle: 25° (📦 #9663)

1 object(s) - format STL

3D design of a round vent cover for ventilation in STL format. Its insertion diameter measures 143 mm. The slats have a slight angle of 25° and a low thickness of 1.4 mm. This 3D vent grille features a thin flange of 5 mm. The full diameter of this model is 153 mm.

Parameter	Value	Unit
male diameter	143	mm
slat angle	25	°
slat thickness	1.4	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 143 mm, slat angle: 25° (📦 #9662)

1 object(s) - format STL

File of a round vent cover for air circulation in STL format. Its male diameter is 143 mm. The slats have a slight angle of 25° and a high thickness of 2.4 mm. This vent cover features a thin flange of 5 mm. The full diameter of the model is 153 mm.

Parameter	Value	Unit
male diameter	143	mm
slat angle	25	°
slat thickness	2.4	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 143 mm, slat angle: 30° (📦 #9661)

1 object(s) - format STL

3D design of a round vent cover for ventilation in STL format. Its male diameter is 143 mm. The slats have a slight angle of 30° and a low thickness of 1.5 mm. This aeration grille features a thin flange of 5 mm. The total diameter of this model is 153 mm.

Parameter	Value	Unit
male diameter	143	mm
slat angle	30	°
slat thickness	1.5	mm
flange width	5	mm
central reinforcement	no

Round air vent STL 3D file ∅ 100.5 mm, slat angle: 30° with central reinforcement (📦 #9634)

1 object(s) - format STL

File of a round air vent for ventilation in STL format. Its male diameter measures 100.5 mm. The slats have a slight angle of 30° and a high thickness of 2 mm. A central reinforcement secures the whole structure. This vent cover features a flange of 10 mm. The overall diameter of the model is 120.5 mm.

Parameter	Value	Unit
male diameter	100.5	mm
slat angle	30	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 70 mm, slat angle: 45° (📦 #9623)

1 object(s) - format STL

3D file of a round grille for air circulation in STL format. Its male diameter is 70 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. This aeration grille features a thin flange of 2 mm. The total diameter of this model is 74 mm.

Parameter	Value	Unit
male diameter	70	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	2	mm
central reinforcement	no

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.