Roof Vents, Attic Fans & Roof Vent Accessories

ASF-18-C04-CMF | 1740 CFM Aura Solar Fan Curb Mount Flange 18″ Diameter 4″ Collar

$682.00

  • Shut Off Switch options

    Optional Fan Controls

    • 20 $
    • 60 $

  • Tandem Solar Panel

    An Additional Solar Panel is optional with all solar fans. 

    • 250 $

    We need to know the type of roof (Flat or Pitched) to supply the correct brackets. 

    • $
    • $

  • Metal Finish Options

    All our aluminum products can be painted with a durable baked-on powder coating surface finish.

    • 0 $
    • 25 $
    • 50 $

    Hover (or tap once) to show color with name, Click (or tap again) to select.

    Hover (or tap once) to show color with name, Click (or tap again) to select.

Brand: Active VentilationUPC(GTIN): 843951002781 SKU: ASF-18-C04-CMF Category:
Products with Related Sizes and Features to ASF‑18‑C04‑CMF Larger Diameter: ASF‑20‑C04‑CMF $835ASF-20-C04-CMF | 2029 CFM Aura Solar Fan Curb Mount Flange 20″ Diameter 4″ CollarTaller Collar sku: ASF‑18‑C06‑CMF $685ASF-18-C06-CMF | 1740 CFM Aura Solar Fan Curb Mount Flange 18″ Diameter 6″ CollarSmaller Diameter sku: ASF‑16‑C04‑CMF $572ASF-16-C04-CMF | 1375 CFM Aura Solar Fan Curb Mount Flange 16″ Diameter 4″ Collar
Categories and Pages Related to ASF‑18‑C04‑CMF Solar Attic Fans ‑ CommercialReturn/Cancellation PolicyWarrantiesShipping/Delivery Policies
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ASF-18-C04-CMF-brochure

Dimensions

Basic dimensions of the Aura Solar 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:

18 in.
45.7 cm.

Outside Diameter:

23 in.
58.4 cm.

Square Flange (side length):

22 in.
55.9 cm.

Height of Head:

8 in.
20.3 cm.

Collar Height:

4 in.
10.2 cm.

Height of Flange:

2 in.
5.1 cm.

Total Height with Collar and Flange:

15.25 in.
38.7 cm.

Louvers

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):

5.5 in.
14 cm.

Louver Height (outside):

5.5 in.
14 cm.

Size of opening btwn blades (inside):

0.125 in.
0.3 cm.

Size of opening btwn blades (outside):

0.25 in.
0.6 cm.

Roof Pitch

Expected snow and rain in your region and the pitch of the roof are the key consideration when choosing the height of the collar of your roof vents. Zones 1 and 2 are not expected to sustain significant snow packs, while zones 3-7 are likely to experience snow, possibly for weeks or months. Vent collars under 4 inches are inappropriate for flat (0/12 pitch) roofs because even heavy rain can splash water into a shorter vent.

Map of Climate Zones

Minimum Pitch Capacity:

0/12

Maximum Pitch Capacity (Standard Vent):

12/12

Maximum Pitch Capacity (Modified):

12/12

Air Flow

Total CFM:

1740 CFM

Free Air Space:

254.5 sq. in.
1641.7 sq. cm.

Free Air Space:

1.77 sq. ft.
0.164 sq. m.

1:150 Ventilation Rule:

530.1 sq. ft.
49.3 sq. m.

1:300 Ventilation Rule:

1060.3 sq. ft.
98.5 sq. m.

Fan and Motor

Solar Fan Total Wattage:

30.48 Watts

Fan Count:

9

Solar Power Air Flow:

606 CFM
17.16 CMM

Total Air Flow @0.1SP:

1740 CFM
49.27 CMM

Fan Dimensions:

4.7in. x 4.7 in. x 1 in.
120mm. x 120 mm. x 25 mm.

Bearing Type:

Ball Bearing

Fan Speed (RPM):

2200 RPM

Noise Levels (Decibels):

25 dBa

Rated Voltage:

12V DC

Rated Current (Amps):

0.3A

Power Consumption (Watts):

3.6w

Life Hours:

40000hrs.

Shipping Dimensions for ASF-18-C04-CMF

Manufacturer

Active Ventilation Products

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Installation Guides Under Development. Coming Soon.

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Roof Curb Product Page

Description

This is a premium exhaust fan, with a flange for easy mounting onto a roof curb, ideal for flat industrial roofs. Even when the power is off, it is activated by even a small breeze to forcefully evacuate air using the Venturi effect. All Aura Vents and fans use louver technology to keep your property safe, comfortable, and energy efficient.