Table of Contents

1. Introduction to foil duct
2. Characteristics of Foil Duct
3. Applications in HVAC Systems
4. Installation and Maintenance Guidelines
5. Advantages of Foil Duct in HVAC Systems
6. Subo Company Solutions
7. References

Introduction to Foil Duct

Foil duct, also known as aluminum foil duct or flexible ducting, is a type of ductwork used predominantly in HVAC (Heating, Ventilation, and Air Conditioning) systems. This duct is constructed using a spirally wound layer of aluminum foil, sometimes reinforced with an inner layer of polyester or PVC for added durability.

Characteristics of Foil Duct

Foil ducts are recognized for their flexibility, lightweight nature, and ease of installation. Commonly manufactured in diameters ranging from 4 inches to 24 inches, and lengths from 10 feet to 50 feet per section, foil ducts are tailored to fit a variety of HVAC configurations.

Applications in HVAC Systems

Foil ducts find their primary application in residential and commercial HVAC systems. They are used for both air supply and exhaust purposes. Their flexibility allows them to be routed through complex paths without requiring multiple fittings and connectors, thereby reducing installation time and cost.

Thermal Resistance

Foil ducting often includes an insulation layer, providing a thermal resistance (R-value) that ranges between R-4.2 to R-8.0, helping to minimize heat loss or gain during air transmission.

Airflow Characteristics

With a roughness factor of 0.0005 feet, foil ducts are engineered to maintain efficient airflow. The smooth interior surface reduces air friction, ensuring minimal pressure loss and maintaining system efficiency.

Installation and Maintenance Guidelines

Proper installation of foil ducts involves ensuring an airtight seal at each connection using high-quality duct tape or approved sealants. Regular inspections and cleaning should be carried out to prevent debris build-up and maintain air quality.

Installation Tips

• Ensure ducts are fully extended to prevent sagging.
• Avoid sharp bends that may restrict airflow.
• Secure ducts using appropriate metal clamps or straps.

Advantages of Foil Duct in HVAC Systems

The use of foil ducting in HVAC systems is advantageous due to its flexibility, cost-effectiveness, and ease of handling. Its non-combustible nature also enhances safety standards within a building.

Subo Company Solutions

Subo Company offers a wide range of foil duct products designed to meet diverse HVAC requirements. Their products include:

• Insulated foil ducts offering superior thermal efficiency with R-values up to R-8.
• Custom-length foil ducts for individualized project needs.
• High-durability options featuring reinforced layers for added resilience.

References

1. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Handbook.
2. National Air Duct Cleaners Association (NADCA) Standards.
3. Subo Company Product Specifications.