NGP L-1900 Fire Rated Fusible ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$461.00
$428.17
NGP L-1900 Fire Rated Fusible Link Steel Louver

NGP L-1900 Fire Rated Fusible Link Steel Louver with 165 F Activation for 90-Minute Doors

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Model: L-1900-24X24-DKB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$461.00
$428.17
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NGP Fire Rated Fusible Link Steel Louver with 165 F Activation for 90-Minute Doors

UL Certified Fire Protection Louver for Commercial Door Applications

The NGP Fire Rated Fusible Link Steel Louver provides essential fire protection for hollow metal and wood fire doors rated up to 90 minutes. Designed for 1-3/4" thick doors, this UL certified louver features 165 F fusible link activation and 18 gauge cold rolled steel construction. Available in sizes from 10" x 6" minimum to 24" x 30" maximum in whole inch increments, with 40% free area for optimal airflow when open.

Professional Features & Benefits

  • Door Compatibility: Designed for 1-3/4" thick doors up to 90-minute fire rating for comprehensive fire door applications.
  • Size Range Flexibility: Available in whole inch increments from minimum 10" x 6" to maximum 24" x 30" for versatile installation options.
  • Heavy-Duty Steel Construction: 18 gauge cold rolled steel frame and adjustable "Z" blades with mitered corners secured by reinforcing clips for exceptional durability.
  • Automatic Fire Activation: 165 F fusible link with stainless steel spring automatically closes blades when activated by fire or heat for reliable protection.
  • Optimal Airflow Design: 40% free area provides excellent ventilation when open while maintaining fire protection capability when closed.
  • UL Fire Certifications: Certified by UL to CAN/ULC-S104, ANSI/UL10B, and ANSI/UL10C standards, complying with NFPA 80 and NFPA 252 requirements.
  • Positive Pressure Rating: UL certified to ANSI/UL10C for positive pressure applications, meeting IBC requirements for enhanced fire safety.
  • Professional Finish: Gray primer powder coat finish provides corrosion resistance and professional appearance for commercial applications.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Lite Kits and Louvers
  • Product Type: Lite Kits & Louvers
  • Subcategory: Lite Kits & Louvers

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings
  • Fire-Rated Door Assemblies

Why Choose NGP Quality?

NGP Fire Rated Fusible Link Steel Louvers deliver professional-grade fire protection with UL certified performance to multiple standards including CAN/ULC-S104, ANSI/UL10B, and ANSI/UL10C. The heavy-duty 18 gauge cold rolled steel construction with reinforcing clips and stainless steel spring components ensures reliable operation in demanding commercial fire safety applications. Engineered for compliance with NFPA 80, NFPA 252, and IBC requirements where dependable fire protection performance is essential.

Manufacturer Resources

NGP Lite Kits and Louvers

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Lite Kits & Louvers
Product Type:
Louvers
Subcategory:
Lite Kits & Louvers
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Department:
Door Hardware

NGP L-1900-24X24-DKB – Frequently Asked Questions

1) Will the NGP L-1900 louver work in a 90-minute rated fire door?
Yes, up to 90 minutes. The L-1900 fusible link steel louver is built for hollow metal and wood fire doors rated up to 90 minutes, and it is UL certified to CAN/ULC-S104, ANSI/UL10B and ANSI/UL10C, complying with NFPA 80 and NFPA 252. Anything above a 90-minute assembly is outside what this louver covers.
2) What cut out sizes can I order the NGP L-1900 louver in?
Three cut out sizes are stocked: 12 x 12, 18 x 18 and 24 x 24 inches (width x height). The L-1900 is made in whole inch increments from a 10 x 6 inch minimum to a 24 x 30 inch maximum, so those three cover the common door prep sizes within that range.
3) How does a fusible link louver close during a fire?
Heat at 165 F melts the fusible link, and a stainless steel spring drives the adjustable Z blades shut, sealing the opening. No power, no wiring, no signal from the fire alarm is involved. That is why a fusible link louver is what goes in a rated door where ventilation is needed in normal use but the opening has to close itself when a fire starts.
4) Is this louver approved for positive pressure fire door testing?
Yes. The L-1900 is UL certified to ANSI/UL10C, which is the positive pressure test standard, so it meets IBC requirements for positive pressure applications. It also carries ANSI/UL10B (neutral pressure) and CAN/ULC-S104 for Canadian jobs.
5) How much airflow do I get through the NGP L-1900 louver?
40 percent free area when the blades are open. On a 24 x 24 inch cut out that works out to roughly 230 square inches of open area, so it is worth sizing the cut out to the transfer air you actually need rather than assuming the largest louver.
6) What gauge steel is the NGP L-1900 louver, and will it hold up in a school or hospital corridor?
18 gauge cold rolled steel frame and blades, with mitered corners held by reinforcing clips and a stainless steel spring on the link. That construction is aimed at commercial traffic, and the listed applications include educational facilities, healthcare institutions, industrial and warehouse buildings, and multi-tenant residential.
7) Can I put a fire rated louver in a wood fire door, or only hollow metal?
Both. The L-1900 is stated for hollow metal and wood fire doors up to a 90-minute rating, at 1-3/4 inch thickness. The cut out has to fall inside the 10 x 6 inch minimum to 24 x 30 inch maximum range, and per NFPA 80 the door manufacturer's label governs whether that door is permitted to be cut for a louver at all.
8) What finish does the NGP L-1900 louver come in, and can I paint it?
Gray primer powder coat. It is a primer finish, so it is meant to be topcoated to match the door if the job calls for a specific color, and it gives corrosion resistance in the meantime. There is no decorative finish option on this louver.
How fast can I get the NGP L-1900-24X24-DKB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the NGP L-1900-24X24-DKB come with a warranty?
Absolutely. The NGP L-1900-24X24-DKB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the NGP L-1900-24X24-DKB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the NGP L-1900-24X24-DKB from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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