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Butler Building
ROUND VENTS
The Simple, Reliable Ventilation Solution for Butler Buildings
Improve Airflow and Comfort Without Increasing Energy Costs
Maintaining proper airflow inside a metal building is critical for comfort, moisture control, and long-term building performance. Butler Round Vents offer a simple, cost-effective solution by using natural airflow to move hot, stale air out while allowing fresh air to circulate throughout the space.
Because they operate without electricity, round vents reduce energy costs while still delivering consistent ventilation. Ideal for warehouses, light industrial facilities, and smaller-scale buildings, they provide reliable performance with minimal upkeep and long service life.
Benefits of Butler Round Vents
Round Gravity Vents
Improve airflow and temperature control in your steel building without increasing energy costs using Metallic Products’ round gravity vents. Designed for efficient, low-volume ventilation, they are ideal for warehouses, light industrial spaces, attics, and similar applications.
Operating without electricity, these vents provide natural airflow with little to no maintenance required. An adjustable damper allows you to control air movement while helping protect against wind-driven rain and backdraft.
Built for both function and appearance, round vents are available in a variety of colors and finishes to match your building or create a clean, modern accent.
Standard Sizes
Standard round gravity ventilators are available in 12”, 20” and 24” diameter throat sizes.
Integral Dampers
The damper is supported in the open position by four strong springs and is closed by a 5’ pull chain. Longer lengths are available upon request. Damper may be locked in any position by using the optional key type chain lock. Gravity ventilators may be furnished without damper if desired. However, overspray or driven rain may enter the vented space. Gravity vents with dampers may function as smoke exhaust vents by including a fusible link in the chain operator.
Construction
Aerodynamic design enhances the looks and performance of metal buildings’ architectural roof systems. Unit moves toward the ridge on floating roofs, and vents are made to match roof slope and maintain a low-profile appearance.
Bird Screen
Assembly requires the installation of a 4 x 4 bird screen in the opening, between the inner band and rain shield, to prevent birds from entering the vent area.
Finish
Galvalume finish is standard, but other colors — including Kynar® — are available upon request.
Base Design
Base is specifically designed for final installation with specified roof slope — either ridge or single slope, and either flat or mounted into the specified roof panel. Base and ventilating unit arrive preassembled, ready for installation. Single-slope bases mount directly to the roof panel and are placed in such a way as to prevent damming.
Note: When ordering, please specify roof slope, base type, damper pull chain and paint color.
Specification Table
| Throat | W | H | TH | Shipping Weight (lbs.) |
|---|---|---|---|---|
| 12" | 18" | 7-1/2" | 14-1/2" | 90 |
| 20" | 30" | 10" | 17-1/2" | 110 |
| 24" | 36" | 12" | 23-1/2" | 120 |
In Stock and Ready to Ship
Butler-Cote Metal Panel Colors
Butler Cote colors are engineered for long term performance, with exceptional fade and chalk resistance that outlasts conventional paint systems. Cool Colors meet Title 24 energy standards and support LEED certification, giving your building proven longevity and a finish that protects your investment for decades.
Gable trim, eave trim, gutter and downspouts included.
Cool Solar White
Cool Igloo White
Cool Ivory White
Cool Birch White
Cool Shell Gray
Cool Country Wheat
Cool Desert Beige
Cool Gray Stone
Cool Emerald Green
Cool Ocean Blue
Cool Majestic Blue
Cool Brick Red
Cool Harvest
Cool Onyx Black
Cool Marsh Green
Cool Palm Green
Cool Solar White
Cool Birch White
Cool Shell Gray
Cool Country Wheat
Cool Emerald Green
Cool Gray Stone
Cool Majestic Blue
Cool Marsh Green
Cool Ocean Blue
Not formulated for exterior use.
Light Gray
Igloo White
Interior White
Cool Marsh Green
Selected color
Frequently Asked Questions
Still deciding if a Butler building is right for your project? Here’s what most builders ask us before they get started.
Still have questions?
Talk to a real person. Call our Pro Desk Expert Line or request a callback.
What makes a Butler building different from other metal buildings?
Butler has been engineering steel buildings for over 125 years, and AM Star is an authorized Butler distributor, not a reseller of generic components. Every building you get through us uses genuine Butler engineered parts, backed by Butler’s manufacturing standards.
Can I customize the size and layout of my building?
Yes. Butler buildings are engineered to your exact specifications, size, use, and site requirements, whether that’s a small workshop or a large industrial facility. Our team works with you from initial design through structural engineering to make sure it fits your project.
How much does a Butler building cost?
Pricing depends on size, building type, durability grade, and site conditions, so there’s no single number that fits every project. Request a quote and we’ll get you accurate pricing fast, tailored to your specific building.
How long does the process take, from quote to finished building?
Timelines vary by project scope and current fabrication schedules. Once you request a quote, we’ll give you a realistic timeframe based on your specific building and location.
Do you handle engineering and permitting?
Yes. Every Butler building is engineered to meet local codes and structural requirements, with stamped drawings provided for permitting, backed by Butler’s manufacturing standards.
What's the difference between a Butler building and a barndominium?
A barndominium is one type of building you can build using Butler’s steel building system, combining residential living space with a metal building structure. It uses the same engineered components and durability standards as our other building types.
What if I'm not building new, I just need parts or repairs?
We also supply genuine Butler parts and components for repairs, replacements, or expansions, no need to order a full building. Browse our parts catalog or contact us directly.
How do I get started?
Request a quote and tell us about your project, building type, size, and timeline. We’ll follow up with accurate pricing and next steps, no pressure, no runaround.
Price my Butler Building
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Available 7 Days a Week from 8am to 5pm and Evenings by Appointment.
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Tell us about your project and we'll put together accurate pricing on a genuine factory-spec Butler building. Every quote is engineer-reviewed and tailored to your building type, size, and timeline.
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