3" Uninsulated Flexible Duct — 50ft

Standard 3" Uninsulated Flexible Duct for Home-Run Ventilation Layouts

A reliable, no-frills flexible duct solution for routing supply and exhaust air through residential ventilation systems. This 50-foot roll of standard uninsulated 3" flex duct is the workhorse of any home-run (radial) ERV or HRV layout — flexible enough to navigate joists, cavities, and tight turns with ease.

Compatible with standard 3" snap-fit manifold ports, grilles, and registers, this duct pairs perfectly with the Ventilate ME™ distribution system for a clean, efficient installation.

Key Features

Standard 3" Diameter: True micro-duct sizing, compatible with standard 3" ventilation fittings, manifolds, and registers

Flexible & Kink-Resistant: Spring steel wire helix maintains round profile through bends and turns, protecting your system's static pressure budget

Uninsulated Construction: Lightweight and easy to handle during rough-in; ideal for conditioned space installations where external insulation is not required

Smooth Inner Core: Minimizes friction loss and turbulence for quiet, efficient airflow

  50 ft Roll: Sufficient for most individual room runs in a home-run ventilation layout

Technical Specifications

Diameter: 3" Round

Length: 50 ft

Insulation: None (uninsulated)

Application: Residential Supply and Exhaust home-run ERV/HRV layouts

Compatibility: Standard 3" ventilation fittings, grilles, registers, and snap-fit manifold ports

What's in the Box

(1) Rolls — 3" Uninsulated Flexible Duct, 50 ft 

Installer Pro-Tip: Keep duct runs as straight as possible and minimize unnecessary loops to achieve the lowest static pressure. For a complete home-run ventilation kit, pair this duct with our Ventilate ME™ Supply and Exhaust Manifold Pairs!