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2025-11-20 00:55:20

How to install 4x25 insulated flex duct?

How to Install 4x25 Insulated Flex Duct

Introduction

Proper installation of 4x25 insulated flex duct is crucial for maintaining efficient airflow within HVAC systems. This guide provides a step-by-step process with precise instructions to ensure a high-quality installation.

Tools Needed

  • Utility knife
  • Measuring tape
  • Duct tape
  • Metal worm gear clamps
  • Flathead screwdriver
  • Gloves and safety goggles

Installation Guide

Preparation

Before starting, ensure the work area is clean and free of debris to maintain safety and efficiency. Check the ductwork layout diagram to understand the planned path and required duct length.

Measuring and Cutting the Duct

Measure the distance between the two endpoint connections using a measuring tape. Cut the 4x25 insulated flex duct to the required length using a utility knife, allowing an extra 2-3 inches for adjustment.

Connecting the Duct

Slide one end of the duct over the starting collar or duct fitting. Use metal worm gear clamps to secure the flex duct to the fitting. Tighten the clamps with a flathead screwdriver to ensure the connection is snug.

Securing and Sealing

Secure the duct along its path using support straps approximately every 4 feet. Ensure there are no sagging sections that could cause airflow resistance. Finally, seal all connections with duct tape to prevent air leakage.

Inspecting the Installation

After installing, visually inspect the entire duct path to ensure all connections are secure and leaks are sealed. Test the airflow by turning on the HVAC system to ensure optimal performance.

Subo Company Solutions

Subo Company offers a variety of high-quality insulated flex duct solutions tailored for specific HVAC applications. Their products are designed to enhance energy efficiency and ensure reliable operation under various conditions. For personalized assistance, consult a Subo representative.

References

  • ASHRAE Handbook: HVAC Systems and Equipment
  • SMACNA (Sheet Metal and Air Conditioning Contractors' National Association) Guidelines
  • Subo Company Technical Manuals

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