Thanks to its excellent products and quality services, UNT Duct is one of the leading pu pre-insulated aluminum duct sheet 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.

PU Pre-insulated Aluminum Duct Sheet

PU Pre‑insulated Aluminum Duct Sheet is a factory‑made, three‑layer sandwich composite panel for HVAC air distribution. It combines structural panel, thermal insulation, vapor barrier and air sealing in one product, replacing the conventional "galvanized steel duct + on‑site insulation" process.

Structure & Materials

Core – Rigid PU Foam

Density: 42-48 kg/m³

Thermal conductivity: 0.020 W/(m·K)

Closed‑cell rate: ≥95%, nearly zero water absorption

Thickness: 10 / 20 / 25 / 30 / 40 mm

Facings – Double‑sided Aluminum Foil / Sheet

Standard: 60–80 μm embossed aluminum foil

Heavy‑duty: 0.1–0.2 mm aluminum sheet

Functions: airtightness, vapor barrier, corrosion resistance, easy cleaning

Standard Panel Size: 3950 mm × 1200 mm (custom lengths available)

Advantages of Polyurethane (PU) Pre-insulated Aluminum Duct Sheet

Superior Energy Efficiency

Integrated insulation eliminates cold bridges

25–30% lower heat gain/loss than GI ducts

HVAC system energy use reduced by 18–22%

Lightweight & Fast Installation

Weight: ~1/5 of insulated GI duct

No on‑site wrapping; 40–60% faster installation

Prefabricated straight sections, elbows, tees; easy cutting & assembly

Airtight & Moisture‑Proof

Air leakage 8× lower than traditional ducts

Closed‑cell PU prevents condensation, mold, and rust

Ideal for high‑humidity, coastal, and basement environments

Hygienic & Cleanroom‑Suitable

Smooth, non‑porous aluminum surface resists dust/bacteria

Easy to clean & disinfect

Meets Class 6–8 cleanroom standards (pharmaceutical, food, electronics)

Fire Safety

No dripping, low smoke toxicity when exposed to fire

Durability & Acoustics

Service life: 20+ years (minimal maintenance)

PU foam absorbs airflow noise: 3–5 dB reduction

Aluminum facing resists corrosion in damp/acidic conditions

PU Pre‑insulated Aluminum Duct Sheet is a high‑efficiency, low‑carbon, long‑life HVAC solution. It integrates insulation, airtightness, and structure, delivering excellent energy savings, faster construction, and better indoor air quality compared to traditional galvanized steel ducts. It is the preferred choice for modern green building HVAC system.