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Aura Roof Exhaust Fan with Curb Mount Flange | CFM: 1000 14″ Diameter 12″ Tall Collar AF-14-C12-CMF


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Brand: Active VentilationUPC(GTIN): 843951009209 SKU: AF-14-C12-CMF Category:

Installation Guides Under Development. Coming Soon.

Drawings for Aura Roof Exhaust Fan with Curb Mount Flange are available Here

Basic dimensions of the Aura Fan and it’s identifying attributes. Primary identifying dimensions of vents and fans are the inside diameter of the Head, which equals the diameter of the hole being vented, and the height of the Collar which is the solid tube between the Head of the vent and the Flange which attaches to the roof.

Inside Diameter:

14 in.
35.6 cm.

Outside Diameter:

18 in.
45.7 cm.

Square Flange (side length):

18 in.
45.7 cm.

Height of Head:

6 in.
15.2 cm.

Collar Height:

12 in.
30.5 cm.

Height of Flange:

2 in.
5.1 cm.

Total Height with Collar and Flange:

20 in.
50.8 cm.

Louvers are the vertical openings in the vent, which facilitates the flow of air, while keeping animals, insects, debris, and embers out.  The combination of inner and outer Louvers on our patented “Aura” series of vents and fans are shaped to create a positive vacuum effect which draws air out of the vent, utilizing a physical principle known as the Venturi effect.

Louver Height (inside):

4 in.
10.16 cm.

Louver Height (outside):

4 in.
10.16 cm.

Size of opening btwn blades (inside):

0.125 in.
0.3175 cm.

Size of opening btwn blades (outside):

0.25 in.
0.635 cm.

How much clearance (vent height) your roof vent needs depends on the pitch of your roof and the climate zone you live in. If you have a 4/12 roof pitch or greater, you can have a low profile vent (1” 2” tall collar) in all climate zones. At a 3/12 roof pitch you can have a 1” or 2” tall collar in zones 1, 2, 3. Having a 3/12 roof pitch in zones 4, 5, 6, 7, 8 you will need a 4” tall collar. For roof pitches 2/12 or less you will need a 4” tall collar in zones 1 & 2. You will need a 6 inch tall collar for zones 3, 4 and an 8” tall collar for zones 5 and 6. You will need an 11″ or 12” tall collar for zones 7 and 8. Bear in mind, you can always use taller collars for additional clearance in warmer zones, but you can’t use shorter collars in colder zones when dealing with low slope roofs. Custom collar heights are also available.

Map of Climate Zones

Free Air Space:

144.0 sq. in.
929.0 sq. cm.

Free Air Space:

1.00 sq. in.
0.0929 sq. m.

1:150 Ventilation Rule:

300.0 sq. in.
27.87 sq. m.

1:300 Ventilation Rule:

600.0 sq. in.
55.74 sq. m.

When the Fan is OFF, the Venturi effect is stimulated by even small breezes creates a positive movement of air out of the vent without the need of any part of the vent to move. This movement of air is proportional to the wind speed, and can be measured in Cubic Feet per Minute or Cubic Meters per Minute.

4 MPH Wind:

178 CFM
Airflow in 6.4 KPH Wind: 5.04 CMM

5.2 MPH Wind:

200 CFM
Airflow in 8.4 KPH Wind: 5.66 CMM

7.4 MPH Wind:

280 CFM
Airflow in 11.9 KPH Wind: 7.93 CMM

9.8 MPH Wind:

315 CFM
Airflow in 15.8 KPH Wind8: 8.92 CMM

11 MPH Wind:

360 CFM
Airflow in 17.7 KPH Wind8: 10.19 CMM

AC Motor Horsepower:

1/8 hp

Max Amps:

1.6 A

Motor Type:


Airflow With Fan:

1000 CFM
28.3 CMM

Fan Blade Count:

5 Blades

Fan Blade Diameter:

12 in.
30.48 cm.

The Aura Fan EXHAUSTS CONTINUOUSLY whether the electric motor is ON or OFF. When the fan is off, outside air moving against the Aura Ventilator causes the Venturi effect, thereby creating an exhaust. The exhaust is created without the use of electricity or moving parts. On the days when the fan is not needed, the Aura Vent will still operate passively; this increases the life of the motor since it is not in constant use. The Aura Fan Ventilator reduces energy consumption.


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