Round air vent grill 3D models

First model: 2025-07-26

Number of 3D models generated: 134

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

Latest models generated

Round air vent STL 3D file ∅ 80 mm, slat angle: 60° with central reinforcement (📦 #3007)

1 object(s) - format STL

Model of a round grille for air circulation in STL format. Its insertion diameter measures 80 mm. The slats have a steep angle of 60° and a high thickness of 2 mm. A central reinforcement strengthens the whole structure. This vent cover features a prominent flange of 20 mm. The total diameter of this model is 120 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	60	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL file ∅ 100 mm, slat angle: 10° with central reinforcement (📦 #2940)

1 object(s) - format STL

3D design of a round grille for ventilation in STL format. Its male diameter measures 100 mm. The slats have a slight angle of 10° and a low thickness of 1.4 mm. A vertical reinforcement secures the slats. This 3D vent grille features a thin flange of 3 mm. The total diameter of this model is 106 mm.

Parameter	Value	Unit
male diameter	100	mm
slat angle	10	°
slat thickness	1.4	mm
flange width	3	mm
central reinforcement	yes

Round air vent STL file ∅ 150 mm, slat angle: 40° with central reinforcement (📦 #2925)

1 object(s) - format STL

3D file of a round air vent for air circulation in STL format. Its male diameter measures 150 mm. The slats have an angle of 40° and a low thickness of 1.6 mm. A central reinforcement secures the whole structure. This aeration grille has a prominent flange of 20 mm. The total diameter of this model is 190 mm.

Parameter	Value	Unit
male diameter	150	mm
slat angle	40	°
slat thickness	1.6	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 55 mm, slat angle: 45° with central reinforcement (📦 #2898)

1 object(s) - format STL

3D design of a round grille for air circulation in STL format. Its male diameter measures 55 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement strengthens the whole structure. This ventilation grille features a prominent flange of 15 mm. The overall diameter of the model is 85 mm.

Parameter	Value	Unit
male diameter	55	mm
slat angle	45	°
slat thickness	2	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL file ∅ 54 mm, slat angle: 45° with central reinforcement (📦 #2877)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its insertion diameter measures 54 mm. The slats have an angle of 45° and a high thickness of 2 mm. A centered vertical reinforcement reinforces the slats. This ventilation grille features a flange of 10 mm. The total diameter of the model is 74 mm.

Parameter	Value	Unit
male diameter	54	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 200 mm, slat angle: 45° with central reinforcement (📦 #2873)

1 object(s) - format STL

3D file of a round air vent for air circulation in STL format. Its insertion diameter is 200 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement reinforces the slats. This 3D vent grille features a prominent flange of 20 mm. The overall diameter of the model is 240 mm.

Parameter	Value	Unit
male diameter	200	mm
slat angle	45	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 53 mm, slat angle: 45° (📦 #2792)

1 object(s) - format STL

File of a round vent cover for air circulation in STL format. Its male diameter measures 53 mm. The slats have an angle of 45° and a high thickness of 2 mm. This 3D vent grille has a flange of 10 mm. The total diameter of this model is 73 mm.

Parameter	Value	Unit
male diameter	53	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 50 mm, slat angle: 45° (📦 #2775)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its insertion diameter is 50 mm. The slats have an angle of 45° and a high thickness of 2 mm. This aeration grille features a collar of 6 mm. The overall diameter of the model is 62 mm.

Parameter	Value	Unit
male diameter	50	mm
slat angle	45	°
slat thickness	2	mm
flange width	6	mm
central reinforcement	no

Round air vent STL 3D file ∅ 125 mm, slat angle: 30° (📦 #2764)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its male diameter is 125 mm. The slats have a slight angle of 30° and a low thickness of 1.6 mm. This 3D vent cover features a thin flange of 5 mm. The overall diameter of this model is 135 mm.

Parameter	Value	Unit
male diameter	125	mm
slat angle	30	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 100 mm, slat angle: 30° with central reinforcement (📦 #2746)

1 object(s) - format STL

Design of a round air vent for air circulation in STL format. Its male diameter measures 100 mm. The slats have a slight angle of 30° and a high thickness of 1.8 mm. A centered vertical reinforcement secures 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	30	°
slat thickness	1.8	mm
flange width	5	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 50 mm, slat angle: 35° (📦 #2735)

1 object(s) - format STL

Model of a round air vent for ventilation in STL format. Its insertion diameter is 50 mm. The slats have an angle of 35° and a low thickness of 1.6 mm. This 3D ventilation grille features no flange.

Parameter	Value	Unit
male diameter	50	mm
slat angle	35	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	no

Round air vent STL file ∅ 90 mm, slat angle: 50° (📦 #2734)

1 object(s) - format STL

File of a round air vent for ventilation in STL format. Its male diameter measures 90 mm. The slats have a steep angle of 50° and a low thickness of 1.6 mm. This 3D vent grille features no flange.

Parameter	Value	Unit
male diameter	90	mm
slat angle	50	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	no

Round air vent STL 3D file ∅ 71 mm, slat angle: 10° (📦 #2715)

1 object(s) - format STL

3D model of a round grille for air circulation in STL format. Its male diameter is 71 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. This vent cover features no flange.

Parameter	Value	Unit
male diameter	71	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	no

Round air vent STL file ∅ 71 mm, slat angle: 60° (📦 #2714)

1 object(s) - format STL

3D model of a round grille for ventilation in STL format. Its insertion diameter is 71 mm. The slats have a steep angle of 60° and a low thickness of 1.6 mm. This vent cover features no flange.

Parameter	Value	Unit
male diameter	71	mm
slat angle	60	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	no

Round air vent STL 3D file ∅ 59 mm, slat angle: 10° (📦 #2711)

1 object(s) - format STL

3D model of a round vent cover for ventilation in STL format. Its male diameter is 59 mm. The slats have a slight angle of 10° and a high thickness of 2.4 mm. This 3D aeration grille has a flange of 6 mm. The total diameter of the model is 71 mm.

Parameter	Value	Unit
male diameter	59	mm
slat angle	10	°
slat thickness	2.4	mm
flange width	6	mm
central reinforcement	no

Round air vent STL file ∅ 59 mm, slat angle: 45° (📦 #2710)

1 object(s) - format STL

3D design of a round vent cover for air circulation in STL format. Its male diameter measures 59 mm. The slats have an angle of 45° and a high thickness of 2.4 mm. This 3D vent grille features a flange of 6 mm. The full diameter of the model is 71 mm.

Parameter	Value	Unit
male diameter	59	mm
slat angle	45	°
slat thickness	2.4	mm
flange width	6	mm
central reinforcement	no

Round air vent STL file ∅ 76 mm, slat angle: 45° (📦 #2619)

1 object(s) - format STL

3D model of a round grille for air circulation in STL format. Its insertion diameter is 76 mm. The slats have an angle of 45° and a low thickness of 1.5 mm. This 3D vent grille features a prominent flange of 20 mm. The full diameter of this model is 116 mm.

Parameter	Value	Unit
male diameter	76	mm
slat angle	45	°
slat thickness	1.5	mm
flange width	20	mm
central reinforcement	no

Round air vent STL file ∅ 75 mm, slat angle: 45° (📦 #2617)

1 object(s) - format STL

Design of a round air vent for air circulation in STL format. Its male diameter is 75 mm. The slats have an angle of 45° and a high thickness of 2 mm. This vent cover features a prominent flange of 15 mm. The total diameter of the model is 105 mm.

Parameter	Value	Unit
male diameter	75	mm
slat angle	45	°
slat thickness	2	mm
flange width	15	mm
central reinforcement	no

Round air vent STL 3D file ∅ 115 mm, slat angle: 10° with central reinforcement (📦 #2581)

1 object(s) - format STL

Design of a round grille for ventilation in STL format. Its insertion diameter measures 115 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. A centered vertical reinforcement secures the whole structure. This aeration grille has a prominent flange of 17 mm. The total diameter of the model is 149 mm.

Parameter	Value	Unit
male diameter	115	mm
slat angle	10	°
slat thickness	2	mm
flange width	17	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 158 mm, slat angle: 33° with central reinforcement (📦 #2554)

1 object(s) - format STL

3D design of a round vent cover for air circulation in STL format. Its male diameter measures 158 mm. The slats have an angle of 33° and a low thickness of 1.6 mm. A centered vertical reinforcement secures the whole structure. This 3D vent cover has a prominent flange of 15 mm. The full diameter of the model is 188 mm.

Parameter	Value	Unit
male diameter	158	mm
slat angle	33	°
slat thickness	1.6	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL file ∅ 77.5 mm, slat angle: 10° with central reinforcement (📦 #2529)

1 object(s) - format STL

Model of a round air vent for ventilation in STL format. Its insertion diameter is 77.5 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. A vertical reinforcement strengthens the whole structure. This ventilation grille features a collar of 10 mm. The overall diameter of the model is 97.5 mm.

Parameter	Value	Unit
male diameter	77.5	mm
slat angle	10	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL file ∅ 145 mm, slat angle: 45° with central reinforcement (📦 #2493)

1 object(s) - format STL

3D design of a round vent cover for air circulation in STL format. Its male diameter measures 145 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement secures the slats. This 3D ventilation grille has a prominent flange of 20 mm. The total diameter of this model is 185 mm.

Parameter	Value	Unit
male diameter	145	mm
slat angle	45	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 150 mm, slat angle: 40° with central reinforcement (📦 #2492)

1 object(s) - format STL

3D file of a round vent cover for air circulation in STL format. Its insertion diameter measures 150 mm. The slats have an angle of 40° and a low thickness of 1.6 mm. A centered vertical reinforcement secures the slats. This 3D vent grille features a flange of 7 mm. The total diameter of the model is 164 mm.

Parameter	Value	Unit
male diameter	150	mm
slat angle	40	°
slat thickness	1.6	mm
flange width	7	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 115 mm, slat angle: 45° with central reinforcement (📦 #2398)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its insertion diameter measures 115 mm. The slats have an angle of 45° and a high thickness of 2 mm. A central reinforcement secures the slats. This vent grille has a flange of 10 mm. The overall diameter of the model is 135 mm.

Parameter	Value	Unit
male diameter	115	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 115 mm, slat angle: 10° (📦 #2396)

1 object(s) - format STL

3D design of a round vent cover for ventilation in STL format. Its male diameter is 115 mm. The slats have a slight angle of 10° and a high thickness of 2 mm. This 3D vent cover features a flange of 10 mm. The full diameter of this model is 135 mm.

Parameter	Value	Unit
male diameter	115	mm
slat angle	10	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

Round air vent STL 3D file ∅ 115 mm, slat angle: 45° (📦 #2390)

1 object(s) - format STL

3D file of a round grille for air circulation in STL format. Its male diameter is 115 mm. The slats have an angle of 45° and a high thickness of 2 mm. This ventilation grille has a collar of 10 mm. The full diameter of this model is 135 mm.

Parameter	Value	Unit
male diameter	115	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

Round air vent STL 3D file ∅ 80 mm, slat angle: 45° (📦 #2386)

1 object(s) - format STL

Model of a round grille for air circulation in STL format. Its insertion diameter measures 80 mm. The slats have an angle of 45° and a high thickness of 2 mm. This vent cover has a flange of 10 mm. The full diameter of this model is 100 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 80 mm, slat angle: 45° with central reinforcement (📦 #2385)

1 object(s) - format STL

File of a round grille for ventilation in STL format. Its male diameter measures 80 mm. The slats have an angle of 45° and a high thickness of 2 mm. A vertical reinforcement reinforces the whole structure. This vent grille has a flange of 8 mm. The total diameter of the model is 96 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	45	°
slat thickness	2	mm
flange width	8	mm
central reinforcement	yes

Round air vent STL file ∅ 80 mm, slat angle: 45° with central reinforcement (📦 #2384)

1 object(s) - format STL

File of a round air vent for ventilation in STL format. Its male diameter is 80 mm. The slats have an angle of 45° and a high thickness of 2 mm. A vertical reinforcement reinforces the whole structure. This 3D vent grille features a prominent flange of 20 mm. The overall diameter of the model is 120 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	45	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL file ∅ 92 mm, slat angle: 40° with central reinforcement (📦 #2307)

1 object(s) - format STL

Design of a round vent cover for air circulation in STL format. Its insertion diameter measures 92 mm. The slats have an angle of 40° and a high thickness of 2 mm. A central reinforcement secures the whole structure. This 3D ventilation grille has a collar of 10 mm. The full diameter of this model is 112 mm.

Parameter	Value	Unit
male diameter	92	mm
slat angle	40	°
slat thickness	2	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.