Round air vent grill 3D models

First model: 2025-07-26

Number of 3D models generated: 344

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 ∅ 142 mm, slat angle: 45° (📦 #9538)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its insertion diameter measures 142 mm. The slats have an angle of 45° and a high thickness of 2 mm. This aeration grille features a thin flange of 3 mm. The overall diameter of this model is 148 mm.

Parameter	Value	Unit
male diameter	142	mm
slat angle	45	°
slat thickness	2	mm
flange width	3	mm
central reinforcement	no

Round air vent STL 3D file ∅ 112 mm, slat angle: 40° (📦 #9489)

1 object(s) - format STL

3D model of a round air vent for ventilation in STL format. Its insertion diameter is 112 mm. The slats have an angle of 40° and a low thickness of 1.6 mm. This aeration grille features a thin flange of 5 mm. The total diameter of this model is 122 mm.

Parameter	Value	Unit
male diameter	112	mm
slat angle	40	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 110 mm, slat angle: 40° (📦 #9485)

1 object(s) - format STL

File of a round vent cover for ventilation in STL format. Its male diameter is 110 mm. The slats have an angle of 40° and a low thickness of 1.6 mm. This 3D vent grille features a thin flange of 5 mm. The overall diameter of this model is 120 mm.

Parameter	Value	Unit
male diameter	110	mm
slat angle	40	°
slat thickness	1.6	mm
flange width	5	mm
central reinforcement	no

Round air vent STL file ∅ 144 mm, slat angle: 35° (📦 #9445)

1 object(s) - format STL

Design of a round air vent for air circulation in STL format. Its male diameter is 144 mm. The slats have an angle of 35° and a high thickness of 2 mm. This 3D ventilation grille features a prominent flange of 20 mm. The full diameter of this model is 184 mm.

Parameter	Value	Unit
male diameter	144	mm
slat angle	35	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	no

Round air vent STL file ∅ 50 mm, slat angle: 35° with central reinforcement (📦 #9338)

1 object(s) - format STL

3D design of a round grille for air circulation in STL format. Its male diameter measures 50 mm. The slats have an angle of 35° and a high thickness of 2 mm. A vertical reinforcement reinforces the whole structure. This 3D aeration grille has a flange of 10 mm. The total diameter of this model is 70 mm.

Parameter	Value	Unit
male diameter	50	mm
slat angle	35	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL file ∅ 130 mm, slat angle: 45° (📦 #9258)

1 object(s) - format STL

3D model of a round grille for ventilation in STL format. Its insertion diameter is 130 mm. The slats have an angle of 45° and a high thickness of 2 mm. This vent cover features a prominent flange of 20 mm. The full diameter of this model is 170 mm.

Parameter	Value	Unit
male diameter	130	mm
slat angle	45	°
slat thickness	2	mm
flange width	20	mm
central reinforcement	no

Round air vent STL 3D file ∅ 78 mm, slat angle: 45° (📦 #9245)

1 object(s) - format STL

3D model of a round air vent for air circulation in STL format. Its male diameter measures 78 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. This aeration grille features a flange of 10 mm. The total diameter of this model is 98 mm.

Parameter	Value	Unit
male diameter	78	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 75 mm, slat angle: 45° (📦 #9244)

1 object(s) - format STL

3D file of a round vent cover for air circulation in STL format. Its insertion diameter is 75 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. This vent grille features a flange of 10 mm. The overall diameter of this model is 95 mm.

Parameter	Value	Unit
male diameter	75	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 68 mm, slat angle: 45° (📦 #9241)

1 object(s) - format STL

3D design of a round grille for air circulation in STL format. Its male diameter measures 68 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. This vent grille has a flange of 10 mm. The overall diameter of this model is 88 mm.

Parameter	Value	Unit
male diameter	68	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	no

Round air vent STL 3D file ∅ 65 mm, slat angle: 45° (📦 #9240)

1 object(s) - format STL

Model of a round grille for ventilation in STL format. Its male diameter is 65 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. This aeration grille features a flange of 10 mm. The full diameter of the model is 85 mm.

Parameter	Value	Unit
male diameter	65	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 194 mm, slat angle: 45° with central reinforcement (📦 #9206)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its male diameter measures 194 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. A central reinforcement reinforces the slats. This 3D vent grille features a prominent flange of 17 mm. The full diameter of this model is 228 mm.

Parameter	Value	Unit
male diameter	194	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	17	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 96 mm, slat angle: 45° (📦 #9172)

1 object(s) - format STL

Design of a round air vent for air circulation in STL format. Its male diameter is 96 mm. The slats have an angle of 45° and a high thickness of 2 mm. This ventilation grille has a flange of 10 mm. The overall diameter of this model is 116 mm.

Parameter	Value	Unit
male diameter	96	mm
slat angle	45	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 115 mm, slat angle: 30° with central reinforcement (📦 #8974)

1 object(s) - format STL

3D model of a round grille for air circulation in STL format. Its insertion diameter is 115 mm. The slats have a slight angle of 30° and a low thickness of 1.5 mm. A central reinforcement reinforces the whole structure. This vent grille features a prominent flange of 20 mm. The full diameter of the model is 155 mm.

Parameter	Value	Unit
male diameter	115	mm
slat angle	30	°
slat thickness	1.5	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL file ∅ 77 mm, slat angle: 10° with central reinforcement (📦 #8944)

1 object(s) - format STL

Model of a round air vent for air circulation in STL format. Its male diameter measures 77 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. A centered vertical reinforcement secures the whole structure. This 3D vent grille has a prominent flange of 20 mm. The overall diameter of this model is 117 mm.

Parameter	Value	Unit
male diameter	77	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	20	mm
central reinforcement	yes

Round air vent STL file ∅ 74 mm, slat angle: 10° (📦 #8918)

1 object(s) - format STL

Model of a round grille for air circulation in STL format. Its male diameter is 74 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. This ventilation grille features no flange.

Parameter	Value	Unit
male diameter	74	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	no

Round air vent STL 3D file ∅ 80 mm, slat angle: 10° (📦 #8916)

1 object(s) - format STL

3D file of a round grille for air circulation in STL format. Its insertion diameter is 80 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. This 3D vent grille features no flange.

Parameter	Value	Unit
male diameter	80	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	0	mm
central reinforcement	no

Round air vent STL 3D file ∅ 80 mm, slat angle: 10° (📦 #8915)

1 object(s) - format STL

3D design of a round vent cover for ventilation in STL format. Its male diameter is 80 mm. The slats have a slight angle of 10° and a low thickness of 1.6 mm. This aeration grille features a prominent flange of 20 mm. The full diameter of the model is 120 mm.

Parameter	Value	Unit
male diameter	80	mm
slat angle	10	°
slat thickness	1.6	mm
flange width	20	mm
central reinforcement	no

Round air vent STL 3D file ∅ 90 mm, slat angle: 15° with central reinforcement (📦 #8908)

1 object(s) - format STL

Model of a round grille for ventilation in STL format. Its male diameter measures 90 mm. The slats have a slight angle of 15° and a low thickness of 1.4 mm. A vertical reinforcement strengthens the whole structure. This ventilation grille features a prominent flange of 15 mm. The overall diameter of this model is 120 mm.

Parameter	Value	Unit
male diameter	90	mm
slat angle	15	°
slat thickness	1.4	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 85 mm, slat angle: 10° with central reinforcement (📦 #8902)

1 object(s) - format STL

3D model of a round vent cover for air circulation 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 central reinforcement reinforces the whole structure. This ventilation grille features a collar of 10 mm. The overall diameter of this model is 105 mm.

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

Round air vent STL 3D file ∅ 85 mm, slat angle: 60° (📦 #8895)

1 object(s) - format STL

3D design of a round grille for ventilation in STL format. Its male diameter is 85 mm. The slats have a steep angle of 60° and a high thickness of 2 mm. This vent cover has a flange of 10 mm. The total diameter of this model is 105 mm.

Parameter	Value	Unit
male diameter	85	mm
slat angle	60	°
slat thickness	2	mm
flange width	10	mm
central reinforcement	no

Round air vent STL 3D file ∅ 90.5 mm, slat angle: 25° with central reinforcement (📦 #8869)

1 object(s) - format STL

3D model of a round vent cover for ventilation in STL format. Its male diameter measures 90.5 mm. The slats have a slight angle of 25° and a low thickness of 1.4 mm. A vertical reinforcement reinforces the slats. This ventilation grille features a prominent flange of 15 mm. The full diameter of this model is 120.5 mm.

Parameter	Value	Unit
male diameter	90.5	mm
slat angle	25	°
slat thickness	1.4	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 168 mm, slat angle: 45° (📦 #8701)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its male diameter is 168 mm. The slats have an angle of 45° and a low thickness of 1.6 mm. This 3D aeration grille features a flange of 7 mm. The full diameter of this model is 182 mm.

Parameter	Value	Unit
male diameter	168	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	7	mm
central reinforcement	no

Round air vent STL file ∅ 110 mm, slat angle: 45° (📦 #8631)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its insertion diameter is 110 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. This 3D aeration grille features a flange of 10 mm. The overall diameter of the model is 130 mm.

Parameter	Value	Unit
male diameter	110	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	10	mm
central reinforcement	no

Round air vent STL file ∅ 120 mm, slat angle: 45° with central reinforcement (📦 #8625)

1 object(s) - format STL

File of a round vent cover for ventilation in STL format. Its male diameter measures 120 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 ventilation grille has a flange of 10 mm. The overall diameter of this model is 140 mm.

Parameter	Value	Unit
male diameter	120	mm
slat angle	45	°
slat thickness	1.6	mm
flange width	10	mm
central reinforcement	yes

Round air vent STL file ∅ 100 mm, slat angle: 20° (📦 #8573)

1 object(s) - format STL

3D file of a round air vent for ventilation in STL format. Its male diameter is 100 mm. The slats have a slight angle of 20° and a high thickness of 2.4 mm. This 3D vent cover features a prominent flange of 20 mm. The overall diameter of the model is 140 mm.

Parameter	Value	Unit
male diameter	100	mm
slat angle	20	°
slat thickness	2.4	mm
flange width	20	mm
central reinforcement	no

Round air vent STL file ∅ 52 mm, slat angle: 10° with central reinforcement (📦 #8570)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its insertion diameter is 52 mm. The slats have a slight angle of 10° and a low thickness of 1.5 mm. A vertical reinforcement secures the slats. This vent grille has a thin flange of 4 mm. The full diameter of the model is 60 mm.

Parameter	Value	Unit
male diameter	52	mm
slat angle	10	°
slat thickness	1.5	mm
flange width	4	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 130 mm, slat angle: 25° with central reinforcement (📦 #8567)

1 object(s) - format STL

3D design of a round vent cover for air circulation in STL format. Its male diameter is 130 mm. The slats have a slight angle of 25° and a high thickness of 2.4 mm. A central reinforcement strengthens the slats. This vent cover has a prominent flange of 15 mm. The total diameter of this model is 160 mm.

Parameter	Value	Unit
male diameter	130	mm
slat angle	25	°
slat thickness	2.4	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL file ∅ 130 mm, slat angle: 10° with central reinforcement (📦 #8566)

1 object(s) - format STL

3D design of a round air vent for air circulation in STL format. Its male diameter is 130 mm. The slats have a slight angle of 10° and a low thickness of 1.5 mm. A central reinforcement secures the whole structure. This vent grille features a prominent flange of 15 mm. The overall diameter of this model is 160 mm.

Parameter	Value	Unit
male diameter	130	mm
slat angle	10	°
slat thickness	1.5	mm
flange width	15	mm
central reinforcement	yes

Round air vent STL 3D file ∅ 96.4 mm, slat angle: 45° (📦 #8510)

1 object(s) - format STL

File of a round air vent for air circulation in STL format. Its insertion diameter is 96.4 mm. The slats have an angle of 45° and a low thickness of 1.4 mm. This aeration grille has a thin flange of 4 mm. The overall diameter of this model is 104.4 mm.

Parameter	Value	Unit
male diameter	96.4	mm
slat angle	45	°
slat thickness	1.4	mm
flange width	4	mm
central reinforcement	no

Round air vent STL file ∅ 94.4 mm, slat angle: 60° (📦 #8509)

1 object(s) - format STL

3D design of a round vent cover for ventilation in STL format. Its male diameter measures 94.4 mm. The slats have a steep angle of 60° and a high thickness of 2 mm. This 3D aeration grille has a thin flange of 3 mm. The full diameter of this model is 100.4 mm.

Parameter	Value	Unit
male diameter	94.4	mm
slat angle	60	°
slat thickness	2	mm
flange width	3	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.