Pre-insulated duct material is a type of ductwork that combines insulation within the ductwork itself, rather than relying on separate insulation layers. Common materials include rigid foam (like PIR or PU) with aluminum or galvanized steel facings. These systems offer advantages such as improved thermal performance, reduced air leakage, and faster installation compared to traditional ductwork with separate insulation.
1.Common Materials:
Polyisocyanurate (PIR) and Polyurethane (PU) Foams:
These are rigid foam materials that provide excellent insulation and are often used as the core of pre-insulated duct panels.
2.Aluminum Foil:
Typically used as a facing material on the exterior of the duct panels. It provides a vapor barrier, helps with thermal performance, and contributes to the overall durability of the duct.
Galvanized Steel:
Can also be used as a facing material, offering good strength and protection.
3.Phenolic Foam:
Another type of rigid foam, known for its fire resistance and low thermal conductivity.
Advantages of Pre-insulated Duct Material:
*Improved Thermal Performance: The integrated insulation minimizes heat loss or gain, leading to more energy-efficient HVAC systems.
*Reduced Air Leakage: Pre-insulated ducts can have lower air leakage rates compared to traditional ductwork, improving system efficiency.
*Faster Installation: The integrated design can reduce installation time and labor costs.
*Space Saving: Pre-insulated ducts can be more compact than traditional systems with separate insulation.
*Reduced Condensation: The insulation and facing materials help to prevent condensation buildup.
*Durability: The materials used are often resistant to moisture, corrosion, and damage.
Considerations:
*Static Pressure and Air Velocity:
Pre-insulated duct systems may have limitations on static pressure and air velocity, so it's important to consider these factors during design.
InstallationMethods:While generally faster, proper installation techniques are still important, including using appropriate adhesives and accessories.
Examples of Pre-insulated Duct Systems:
CLIMAVER: A brand known for its self-supporting pre-insulated ducts, made with bio-soluble materials.
TSSC Pre-insulated Duct Systems: Use PUR or PIR foam core with aluminum facings.
Pre-insulated Duct Boards: Offer a range of pre-insulated panels, including PIR, PU, and phenolic options.
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