Air Louvers VLFMUL Square Profile Through Bolted Metal Vision Lite for 3/16″ to 1/4″ Thick Glazing w/ Framed Mullions

Air Louvers VLF ThruBolt™ Vision Lites with Mullions are fire-rated vision frames featuring a thru-bolt installation design and welded steel mullions for added security and architectural styling, designed for 1-3/4″ commercial doors and 3/16″ to 1/4″ glazing.

  • Designed for 1-3/4″ door thickness
  • Accepts 3/16″ – 1/4″ glazing thickness
  • Fire ratings up to 180 minutes
  • 18 gauge cold rolled steel construction
  • 1″ welded mullions for divided lite appearance

Product ID: AIR-VLF-MUL

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Product Details

Air Louvers VLF ThruBolt™ Vision Lites with Mullions combine the strength of the ThruBolt™ frame design with welded steel mullions to create a divided lite appearance while maintaining fire-rated performance. Built from 18 gauge steel, these vision lites use thru-bolt fasteners to provide secure installation while allowing architects and contractors to incorporate decorative or security-focused divided lite configurations. Mullions are welded to both sides of the frame and butt to the glazing while maintaining the use of a single glass pane, making this configuration suitable for commercial door openings requiring durability, design flexibility, and code-compliant fire performance.

Specifications
Application: Standard 1-3/4″ door thickness
Glazing thickness: 3/16″ – 1/4″
Frame material: 18 gauge cold rolled steel
Standard finish: Mineral bronze powder coat
Fasteners: #8-32 flathead Phillips thru-bolts with blank heads on one side
Minimum size: 4″ x 4″
Maximum size: Based on glazing listing and door manufacturer approval
Fire ratings: Up to 180 minutes depending on glazing size and listing
UL listings: ANSI/UL 10B, ANSI/UL 10C, CAN/ULC S104
Mullion width: 1″
Mullion depth: 5/8″
Mullion construction: Welded to both sides of frame and butted to glass
Mullion configurations: Multiple column and row configurations available
Optional mullion sizes: 1/2″ x 1/2″, 1/2″ x 3/4″
Optional materials: 304 stainless steel, galvanneal steel, zinc-plated steel
Compatible fire-rated glazing: Firelite, Pyran Platinum F, Fireglass, WireShield
Compatible non-rated glazing: Tempered glass
Optional fasteners: Torx screws
PAK options: Vision lite, glazing, and glazing tape kits available

Downloads

Download Vision-Lite-VSLR-Submittal.pdf

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