Hart Cooley 5502504 Flexible Foil Duct 4 in 25 Ft

Product Description

The HART COOLEY 5502504 is a round, flexible foil duct designed for low-pressure air distribution in residential and light commercial HVAC systems. Constructed from metalized polyester, this duct measures 4 inches in diameter and ships in a 25-foot length, making it well suited for connecting air handlers, exhaust fans, range hoods, and branch runs to diffusers or registers. It is uninsulated, so it is intended for conditioned spaces or applications where condensation and thermal loss are not primary concerns. HVAC technicians and installers reach for this style of flex duct when a lightweight, all-metal-appearance connector is needed in tight chases or short runs.

This duct is commonly used in residential ventilation, bathroom exhaust, dryer transition connections, and HVAC branch duct applications where a 4-inch round flexible connector is required. Its silver metalized polyester construction gives it a metallic appearance similar to aluminum foil duct while remaining flexible enough to route through confined framing cavities. It is appropriate for installations where code accepts metalized polyester flexible duct in place of rigid sheet metal.

Key Features

• 4-inch diameter round profile fits standard collar fittings and boot openings
• 25-foot length provides sufficient material for multiple short branch runs or a single longer connection
• Metalized polyester construction offers flexibility for routing through tight spaces
• Silver finish consistent with metallic duct assemblies
• Lightweight design simplifies handling and installation overhead

Compatibility

Designed as an OEM-style replacement and general-use flexible duct for residential and light commercial HVAC systems requiring a 4-inch round flexible duct connector.

Installation Notes

Installation of flexible duct should be performed by a licensed HVAC technician in accordance with ACCA Manual D and applicable local mechanical codes. Power down the air handling unit and confirm the system is de-energized before connecting or repositioning ductwork. Avoid sharp bends or compressed runs that restrict airflow and reduce system efficiency. Secure both ends with approved clamps or draw bands and seal joints with UL 181-rated mastic or tape as required by local code.