Delta Duct FD5-RN – Reinforced Acoustic Insulated Flexible Duct

The Delta Duct FD5-RN is a reinforced acoustic insulated flexible duct designed to provide superior noise reduction, thermal efficiency, and mechanical durability for advanced HVAC air distribution systems. Combining the acoustic insulation performance of the FD5 with an enhanced reinforced outer jacket (RN Type), this model ensures quiet, efficient, and long-lasting operation even in demanding commercial and industrial environments.

Construction & Design

The FD5-RN features a multi-layer composite structure that delivers both acoustic control and strength:

Inner Core: Perforated aluminum/polyester laminate, permanently bonded with flame-retardant adhesive to a high-tensile steel wire helix, allowing for efficient sound absorption and smooth airflow.
Insulation Layer: High-quality glass wool insulation (available in 16, 24, or 32 kg/m³ density) providing excellent thermal and acoustic insulation.
Outer Jacket (RN Type): Tough, reinforced metalized polyester laminate with a protective mesh layer, offering maximum tear, puncture, and UV resistance — perfect for exposed or mechanically stressed installations.

Key Features

Reinforced Outer Jacket (RN Type) – Heavy-duty outer layer offers superior protection from impact, wear, and environmental exposure.
Acoustic Performance – Perforated inner core design significantly reduces system noise and vibration.
Excellent Thermal Efficiency – Fiberglass insulation minimizes heat loss and enhances HVAC energy performance.
Fire-Resistant & Safe – Constructed from flame-retardant materials compliant with HVAC safety standards.
Durable & Corrosion Resistant – Reinforced layers prevent degradation from moisture or mechanical stress.
Mold & Microbe Resistant – Provides hygienic and clean air distribution.
Flexible & Easy to Install – Ideal for tight or irregular spaces in complex duct layouts.
Long Service Life – Engineered for reliability in heavy-duty, high-performance systems.

Technical Specifications

Diameter: 4” – 20”
Insulation Density: 16, 24, or 32 kg/m³
Insulation Thickness: 25 mm
Length: 25 feet
Maximum Velocity: 5000 FPM (25.5 m/s)
Maximum Positive Pressure: 10” W.C. (2.5 KPa)
Maximum Negative Pressure: ½” W.C. (0.12 KPa)
Insulation R-Value: 4.2 or 6 (F·hr/BTU)

Applications

The Delta Duct FD5-RN is ideal for installations requiring both acoustic control and reinforced protection, such as:

Theaters, cinemas, and performance halls
Hospitals, educational institutions, and laboratories
Commercial kitchens and industrial HVAC systems
High-traffic ceiling spaces, exposed installations, and mechanical rooms
Air handling and distribution systems where noise reduction and strength are essential