Monolithic (Smooth) Acrylic

Aluminum Framed Retrofit Dropout

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 retrofit units are suited to fit on to new or existing roof curbs by APC and others.

Product Data Sheet

Acrylic Retrofit Dropout PDS

ASLDOUL Product Data Sheet


CAD Drawings
PDF Drawings

Curb Mounted Retrofit Dropout


Curb Mounted Retrofit Dropout


Who We Are Brochure

Product Information

Technical Information

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. 


Testing & Approval

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.

Related Products

Kingspan Light + Air LLC

Kingspan Light + Air LLC

28662 North Ballard Drive

Lake Forest, IL 60045

+1 (888) 719 0810