Natural Series Dropout

Natural Series Aluminum Top Only Dropout

Gravity Operated Smoke Vents

Natural Series Dropout

Dropouts are essentially gravity operated acrylic double dome single leaf smoke vents with domes which are designed to automatically drop out in the event of a fire which reaches in excess of 500F. These top only units are suited to fit on top of new or existing roof curbs.


Product Information

Technical Information
Testing & Approvals
Frame Material      Aluminum     
Dome Material Acrylic
Width (Opening) Up to 48"
Length (Opening) Up to 96"
Visible Light Transmittance*  
Double Dome - Clear/Clear 92%
Double Dome - Clear/White 53%
Solar Heat Gain Coefficiency*  
Double Dome - Clear/Clear 0.89
Double Dome - Clear/White 0.63
*Values may vary slightly depending on unit size and specifications.
Test Results
NFPA Fire Rating CC2 Rated / Class A Plastic Performance
Underwriters Laboratories (UL) Listed to UL 793 Standard

Kingspan Light + Air daylighting products have been used on every continent in the world bar one under extreme climatic conditions and are manufactured from the highest quality materials, using state of the art production equipment to rigorous quality control standards, ensuring long-term reliability and service life.

  • 10 year standard material workmanship warranty*
​* Contact Kingspan for more information regarding our terms and conditions and optional warranty programs.


Product Data Sheet
CAD Drawings

Natural Series Top Only Dropout PDS

SLDOULTO Product Data Sheet


AutoCAD Drawing


AutoCAD Drawing (PDF)

Who We Are Brochure

Gladiator External Safety Cage

Related Products

Looking for a different product or need to add something else to your project? Check out our related products below.

Gladiator Roof Safety Products

Do you need help with selecting the right product?

Get in touch with our friendly customer support team and they'll guide you through using Natural Series Dropouts in your project.

Contact Customer Support

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