Delta Duct FD3 – Insulated Flexible Duct

Delta Duct FD3 is a high-quality insulated flexible duct designed for air conditioning and ventilation systems in commercial, industrial, and residential applications. Built for durability and flexibility, the FD3 model provides excellent thermal insulation, airflow efficiency, and installation versatility, making it an ideal choice for HVAC projects of all sizes.

Construction & Design

The Delta Duct FD3 consists of:

Outer Jacket: Metalized PET laminated over clear polyester for enhanced durability and corrosion resistance.
Insulation Layer: Premium fiberglass insulation providing superior thermal performance.
Inner Core: Double layer of clear polyester permanently bonded with flame-retardant adhesive and reinforced with a coated steel spring helix for dimensional stability and smooth airflow.

Key Features

Highly Flexible Design – Easily bends around obstacles and adapts to complex installations.
Excellent Thermal Performance – Fiberglass insulation reduces heat loss and condensation.
Tear & Puncture Resistant – Tough construction ensures long-term reliability.
Corrosion & Microorganism Resistant – Ensures cleaner, maintenance-free air distribution.
Smooth Air-Tight Inner Core – Low friction loss improves system efficiency.
Economical & Easy to Install – Quick, cost-effective connection between HVAC components.
Spring Steel Helix Reinforcement – Provides high structural integrity and shape retention.

Technical Specifications

Diameter: 4” to 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

Commercial and residential HVAC duct systems
Office buildings, shopping malls, hospitals, and industrial facilities
Ideal for connecting equipment, bypassing obstacles, and correcting alignment in ducting systems