Kingspan KoolDuct has been a staple in the United States for nearly two decades, recognized as the first UL 181 listed phenolic duct system. As more contractors discover the advantages of KoolDuct, its acceptance continues to expand, showcasing numerous applications for this innovative phenolic panel across the nation.

Check now

From lining metal ductwork to complete phenolic duct fabrication, there are a variety of ways your business can benefit from Kingspan KoolDuct!

Comparative Overview: PIR Duct vs. Phenolic Duct in HVAC Systems

-05-24

Comparative Overview: PIR Duct vs. Phenolic Duct in HVAC Systems

In modern HVAC systems, selecting appropriate duct materials is crucial for efficiency, safety, and durability. PIR (Polyisocyanurate) and Phenolic are two popular materials for duct construction. This article outlines the essential differences between PIR and Phenolic ducts, emphasizing their traits, advantages, and optimal applications.

Material Composition

PIR Ducts:

PIR ducts consist of Polyisocyanurate foam, a thermoset plastic known for its closed-cell structure, which offers robust thermal and moisture resistance. Typically, PIR ducts are reinforced with aluminum foil on both sides, enhancing their durability and insulation performance.

Phenolic Ducts:

In contrast, Phenolic ducts are made from phenolic foam created from phenol and formaldehyde. This foam features a fine cell structure that provides remarkable thermal insulation. Like PIR ducts, phenolic ducts are usually clad in aluminum foil for increased durability and insulation effectiveness.

Thermal Efficiency

PIR Ducts:

PIR foam is well-known for its thermal insulation capabilities, with a thermal conductivity (lambda value) around 0.022-0.026 W/m·K. This allows PIR ducts to achieve high levels of thermal resistance even with relatively thin insulation, making them ideal for installations needing space efficiency.

Phenolic Ducts:

Phenolic foam typically outperforms PIR in terms of thermal conductivity, ranging from 0.018-0.025 W/m·K. This superior thermal efficiency renders phenolic ducts especially suitable for energy-conscious applications, offering excellent insulation with minimal material thickness.

Fire Safety

PIR Ducts:

PIR ducts exhibit moderate fire resistance. They are self-extinguishing, meaning they stop burning when the ignition source is removed. However, when exposed to fire, PIR foam can emit more smoke and potentially harmful gases compared to phenolic foam.

Phenolic Ducts:

For more details, kindly visit Langfang Clear Chemical.

Phenolic ducts are recognized for their outstanding fire resistance. The foam is highly flame-resistant and generates minimal smoke and toxic fumes when subjected to high temperatures, making phenolic ducts especially advantageous in environments where fire safety is essential, such as commercial buildings and high-occupancy areas.

Advantages and Applications

PIR Ducts:

Thermal Insulation: High efficiency in minimizing heat transfer, ideal for energy-focused installations.

Moisture Resistance: Effective in humid conditions due to their closed-cell makeup.

Durability: The aluminum foil facing adds protection and structural strength.

Phenolic Ducts:

Fire Resistance: Superior fire performance, emitting low smoke levels and few toxic gases.

Thermal Efficiency: Slightly enhanced thermal properties, advantageous for rigorous energy standards.

Lightweight and Strong: Easy to handle and install while ensuring robustness.

Practical Considerations

PIR Ducts:

PIR ducts are well-suited for residential and commercial settings where thermal insulation and moisture resistance are priorities. Their lightweight and durable nature allows for straightforward installation, even in complex ductwork systems.

Phenolic Ducts:

Phenolic ducts are preferred in environments prioritizing fire safety, such as hospitals, schools, and venues with high occupancy. Their excellent thermal performance also makes them perfect for projects requiring the highest energy efficiency standards.

Conclusion

Choosing between PIR and Phenolic ducts involves assessing specific project needs, such as thermal insulation requirements, fire safety factors, and environmental conditions. PIR ducts offer excellent thermal and moisture resistance, making them versatile for diverse applications. On the other hand, phenolic ducts provide exceptional fire safety and slightly better thermal performance, making them ideal for high-safety and energy-efficient settings.

With a clear understanding of the unique features and advantages of each duct type, HVAC professionals can make well-informed decisions that improve system performance, safety, and longevity.

By Sammi

For inquiries about Phenolic Duct Insulation, feel free to contact us. Our knowledgeable sales team is ready to help you find the best options for your needs.