Best Fusible Links for Fire Dampers: 165°F Options for Safer Duct Systems
Answering your search for reliable fusible links for fire dampers: these 165°F (74°C) links are designed to automatically shut dampers to block smoke and flames. They are UL-listed and NFPA-compliant, making them suitable for commercial and institutional buildings. This guide highlights five solid options, suitable for various damper models and installation scenarios. Each product is best for specific damper brands or configurations, so you can pick the one that matches your system’s needs and local code requirements.
Summary of chosen products
| Product | Best For | Key Fit | Notes |
|---|---|---|---|
| Fusible Link 165 Degree Dayton 2TGJ3 | Dayton dampers and similar units | 2TFZ family, CRD50-55, FDR fuse assemblies | Compact 1.5″ x 0.5″ profile |
| Pro Chutes Trash Chute Fusible Link Kit 165° | Trash/laundry chute doors and similar fire dampers | Horizontal/vertical chute doors, 30″ chain | UL-listed, NFPA compliant, adjustable |
| Fusible Link 165 Degree | Laundry & trash chute discharges | Laundry/trash dampers, various manufacturers | Versatile damper compatibility |
| 165 Degree Fusible Link Dayton 2TGJ2 | Dayton 2TGA/2TGC/2TGD series | 2.75″ x 1.0″ | Mid-size profile, broad damper compatibility |
| Globe Fusible Links 165 Degrees Model B | General-purpose globe-style dampers | 2.36″ x 0.75″, load range 3–20 lb | Made in USA, includes S hooks |
Fusible Link 165 Degree Dayton 2TGJ3 for Fire Dampers
Best for Daytons and closely matched dampers within the 2TFZ family, including CRD50-55 and Becket lever-style assemblies. The 1.5″ x 0.5″ profile ensures a compact fit in tight installations. This link operates at 165°F (74°C) and complies with UL Standard 33. Choose this if your system uses Dayton dampers or similar models listed in the product’s compatibility notes. A potential limitation is narrower size options compared to broader universal kits.
Pro Chutes Trash Chute Fusible Link Kit 165°
This universal kit is designed for trash and laundry chute doors and a range of fire dampers. It features a 30-inch adjustable chain, enabling a customizable fit for various door types and configurations. Best for facilities with vertical or horizontal chute doors where code compliance (UL, NFPA) matters. Better for projects needing flexible sizing; avoid if you require a fixed-length, non-adjustable link.
Fusible Link 165 Degree
Best for laundry and trash chute discharges, with compatibility across multiple damper brands such as Dayton, Lloyd Industries, Ruskin, and others. The slightly larger footprint (2.75″ x 1.0″) offers a stable hold in space-constrained installations where a robust link is needed. Choose this if you need broad damper compatibility in a single component. Note that space requirements should be checked against the larger dimensions.
165 Degree Fusible Link Dayton 2TGJ2 for Fire Dampers
Best for Daytons 2TGA/2TGC/2TGD series, this mid-size link measures 2.75″ by 1.0″. It provides UL-listed 165°F performance and is suitable for a broad family of Dayton dampers. Choose this when your system uses the Dayton line and you need a compatible, reliable 165°F link. Limitation: ensure the exact damper model variant matches the listed compatibility.
Globe Fusible Links 165 Degrees Model B
Best for general-purpose globe-style dampers, Model B offers a 2.36″ length and 0.75″ width with a 0.125″ thickness. It includes two stainless steel S hooks and is USA-made. This option suits facilities needing a ready-to-install, basic 165°F fusible link with added hardware. Avoid if your space demands a longer or shorter length than 2.36″ or if a different load specification is needed.
Globe Fusible Links 360 Degree Model B
Best for dampers requiring a 360°F (182°C) response, this 360 Degree Model B offers a larger temperature threshold while retaining the same compact footprint of the Model B line. Suitable for high-heat areas or dampers in kitchens, boiler rooms, or equipment rooms where higher risk profiles exist. Use when 360°F protection is specified; for standard 165°F systems, prefer the 165° options to avoid over-sizing.
Buying Guide
What should you consider when selecting fusible links for fire dampers?
- Compatibility: Verify the damper brand and model family (Dayton, Lloyd, Ruskin, Globe, etc.) and match the listed fittings and sizes exactly.
- Operating temperature: Most fire dampers use 165°F links, but some applications may require higher or lower thresholds. Ensure the chosen link aligns with the system design and code requirements.
- Size and fit: Check length, width, and thickness specifications to ensure a secure fit without interfering with damper operation.
- Code compliance: Prefer UL-listed and NFPA-compliant options to meet local fire code and inspection requirements.
- Installation practicality: Consider adjustable chains or fixed-length links based on installation constraints and future maintenance needs.
- Hardware included: Some products come with S hooks or mounting hardware—account for these in the installation plan.
What installation considerations matter most? Ensure chain length and link placement do not impede damper movement. For vertical installations, verify gravity orientation and ensure the chain can carry any required load without binding. When selecting for multiple dampers, choose a universal or widely compatible model to reduce inventory complexity.
FAQ
- What temperature do fusible links activate at? Most use 165°F (74°C) as the activation point.
- Are these links UL-listed? Yes, the products shown are UL Standard 33 listed and NFPA compliant where noted.
- Can I use a universal link for different damper brands? Some are designed for universal fit, others are brand-specific. Always verify compatibility first.
- Do fusible links include hardware? Some kits include chains or S hooks, while others may require separate hardware.
- What is the typical mounting profile? Profiles range from about 1.5″ x 0.5″ to 2.75″ x 1.0″, depending on the model.
- When should I replace a fusible link? Replace if the link shows signs of wear, corrosion, or if it has activated due to fire testing or damage.