Thanks to its excellent products and quality services, UNT Duct is one of the leading polyurethane hvac duct board manufacturers and suppliers in China. Welcome to buy the high quality and customized products from our factory. We will offer you the best service and fast delivery.

Polyurethane HVAC Duct Board

Polyurethane HVAC Duct Board is a type of rigid thermal insulation panel specifically manufactured for heating, ventilation, and air conditioning (HVAC) air distribution systems. It serves as a pre-insulated duct board used to fabricate lightweight, high-performance ductwork, replacing traditional sheet metal ducts with external insulation.Core Material: Rigid polyurethane (PUR) foam, known for its high closed-cell content (typically above 90%).Facings: Both sides are laminated with reinforced aluminum foil, fiberglass scrim, or other vapor-retarder layers to provide durability, reflectivity, and a smooth air surface.AvailableThickness: 20mm, 25mm, 30mm, 42mm

Advantages of Polyurethane HVAC Duct Board

Superior Thermal Insulation:
Polyurethane has one of the lowest thermal conductivities among insulation materials (typically λ ≈ 0.020–0.024 W/m·K). This allows thinner boards to achieve the same R-value as thicker mineral wool or fiberglass.
Lightweight:
Approximately 1/10 the weight of equivalent sheet metal ducts, reducing building structural load and labor for handling/installation.
Built-in Vapor Barrier:
The foil facings serve as an integrated vapor retarder, preventing condensation and mold growth on duct surfaces.
Smooth Internal Surface:
Low air friction reduces pressure loss and energy consumption; also resists dust accumulation, improving indoor air quality (IAQ).
Leakage Reduction:
With proper fabrication (e.g., grooving, folding, and sealing with foil tape or adhesives), joints and seams can be made extremely airtight, often meeting or exceeding SMACNA (Sheet Metal and Air Conditioning Contractors' National Association) leakage standards.
Noise Absorption:
The foam core provides acoustic insulation, damping fan and air turbulence noise.

How to make Straight Ducts with Polyurethane HVAC Duct Board

Tools: Pre-insulated Duct Cutting Tools Kit, including V cutter.
Method: Boards are scored, folded, and assembled into rectangular; joints sealed with pressure-sensitive aluminum foil tape or water-based acrylic adhesive.
Support: While rigid enough for low-to-medium static pressure (typically ≤ 1500 Pa, or 6″ w.g.), ducts require proper hanging supports per manufacturer guidelines.