How do you install flex duct in an attic?

Installation of Flex Duct in an Attic

Table of Contents

  1. Overview of Flex Duct Installation
  2. Materials and Tools Required
  3. Installation Process
    1. Step 1: Planning and Measurement
    2. Step 2: Cutting and Preparing the Duct
    3. Step 3: Attaching the Duct
    4. Step 4: Sealing Joints
    5. Step 5: Insulating the Duct
  4. Subo Company Solutions
  5. References

Overview of Flex Duct Installation

Installing flex duct in an attic requires precision and adherence to specific guidelines to ensure efficient airflow and energy savings. Flex ducts are often preferred for their flexibility, lightweight, and cost-effectiveness. Proper installation minimizes air leaks and thermal loss.

Materials and Tools Required

  • Flexible ducting
  • Duct hangers or straps
  • Utility knife or duct cutter
  • Measuring tape
  • Aluminum foil duct tape
  • Zip ties
  • Insulation sleeves
  • Protective gloves

Installation Process

Step 1: Planning and Measurement

Before starting, create a layout plan of the duct system. Measure the distances accurately, allowing 10% extra for curves and turns. Ensure the duct route avoids sharp bends to maintain airflow efficiency.

Step 2: Cutting and Preparing the Duct

Using a utility knife, cut the flexible duct to the required length. Remember to factor in additional length for connection to registers and grilles.

Step 3: Attaching the Duct

Secure one end of the duct to the outlet using duct tape and zip ties, ensuring a tight connection. Position duct hangers every 4 feet to support the duct's weight without compressing it.

Step 4: Sealing Joints

Seal all joints meticulously with aluminum foil duct tape. This prevents air leaks and boosts the overall efficiency of the HVAC system.

Step 5: Insulating the Duct

Wrap the flexible duct with insulation sleeves to prevent thermal loss. Proper insulation can improve HVAC efficiency by up to 30%.

Subo Company Solutions

Subo offers durable and high-performance flex ducts designed to withstand the rigors of attic installations. Their solutions focus on reducing thermal loss and ensuring a snug fit in various environmental conditions. For example, Subo's FlexDuraL series provides enhanced insulation with up to R6 rating, suitable for extreme temperature variations.

References

  • HVAC Duct Construction Standards, Sheet Metal and Air Conditioning Contractors' National Association (SMACNA)
  • Residential Duct Systems Guide, Energy Star
  • Subo Company Website, Product Specifications

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