skip to Main Content

Keepa Attic Vent | 4″ Diameter KV-04


Keepa Vent KV-04, 4″ diameter Flat Roof Attic Ventilator with an 11″ Collar Height and 10″ x 10″ Square Flange has 12 square inches of Net Free Air Space (NFA).
  • All our aluminum products can be painted with a durable baked-on powder coating surface finish.

    • 0 $
    • 9 $
    • 18 $

    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): 843951008820 SKU: KV-04 Category:
Attic Vent - Keepa Vent KV-4-HD-1
Attic Vent - Keepa Vent KV-4-HD
Attic Vent - Keepa Vent KV-4-side-1
Attic Vent - Keepa Vent KV-4-top
Attic Vent - Keepa Vent KV-4-bottom
Attic Vent - Keepa Vent KV-4-TP-WT
Attic Vent - Keepa Vent KV-4-TP-WT-top-e1527195587689
Attic Vent - Keepa Vent KV-4 side view
Attic Vent - Keepa Vent KV-4-side
Attic Vent - Keepa Vent KV-4-HD

Click the Logo to see the full documentation of Active Ventilation Products approvals on the Florida DBPR web site.
Florida Approval

Active Ventilation Products Keepa Vent series has been tested and approved by the State of Florida

Shipping Dimensions for KV-04

Actual Package Weight 3 lbs
Dimensions 10 × 10 × 16 in
UPS Dimensional (Billable) Weight 12 lbs

Active Ventilation Products

Click here for -> Shipping / Delivery - Policies and Procedures

CAD Downloads (dwg format):Unmarked Drawing,Cutaway with Measurements

Click to enlarge pdf for print
Attic Vent - Keepa Vent KV-04-C11-cutaway-and-measurements

Basic dimensions of the Keepa Vent 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:

4 in.

Outside Diameter:

7.125 in.

Square Flange (side length):

10 in.

Height of Head:

4 in.

Collar Height:

11 in.

Height of Flange:

0 in.

Total Height with Collar and Flange:

15 in.

Louvers are the vertical openings in the vent, which facilitates the flow of air, while keeping animals, insects, debris, and embers out.

Louver Height (inside):

Number of Louver Rows (inside):


Louver Height (outside):

Size of opening btwn blades (inside):

0.125 in.

Size of opening btwn blades (outside):

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:


Maximum Pitch Capacity (Standard Vent):


Maximum Pitch Capacity (Modified):

Free Air Space:

12 sq in

Free Air Space:

0.09 sq ft

1:150 Ventilation Rule:

26 sq ft

1:300 Ventilation Rule:

52 sq ft
Click to enlarge pdf for print

Our Keepa Vents have UL Certification. Check out other details and specifics on

UL Product IQ™ (Note: UL now requires you to have a free account to access this page)
UL’s Online Certifications Directory.

UL Certificate of Compliance - Keepa Vent

Texas Department of Insurance - Letterhead

Link to TDI Approval Document, from their web site

Texas Department of Insurance - Evaluation Program

Texas Department of Insurance - Keepa Vent Chart


Active Ventilation Products Keepa vent will alleviate moisture in the winter and heat in the summer to extend the life of the roof and building structure. The Keepa vent is best used for flat roof attic spaces as an exhaust roof vent or fresh air supply intake roof vent. Made of corrosion resistant aluminum, the Keepa vent has a round concentric vent cap and standard 11 in. collar height, square flange and an inner louver wildlife guard. The vent cap is a manufactured one piece spun round aluminum cap that prevents rain and snow from entering the vent. The vent cap is removable to allow access for an easy rubber boot installation for membrane roofs. The 11 in. standard collar is excellent for locations that accumulate high levels of snow falls and the round design is aerodynamic to with stand wind speeds up to 200 mph. The Keepa vent has proven to be an excellent and economical choice for a flat roof application.

  • Best used for flat roof attic ventilation No more than 2/12 pitch is recommended
  • Model KV-4 has aluminum 10 in. x 10 in. flat square flange
  • 3 in. flashing
  • Built-in inner vertical louver cylinder that keeps out insects, birds, and animals while allowing air to move through the vent without resistance
  • Net free air space: 12 sq. in. (.09 sq. ft.)
  • Pitch capacity range: 0/12 to 12/12
  • Ventilation rule 1:300: one vent per 52 sq. ft.
  • Built-in inner vertical louver cylinder has a 1/8th in. opening between the louver blades and all aluminum (“noncombustible”) material meets the requirements of California building code 706A.2 vents to resist the intrusion of burning embers and flame through ventilation openings
  • 5-year warranty