Name: PU Aluminum Pre-insulated Duct Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 302390405

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

If you are tired of corrosion, heavy maintenance, or thermal loss in your air conditioning and ventilation systems, it's time to upgrade to the PU Aluminum Pre-insulated Duct-the smart, efficient, and durable solution for modern HVAC projects.

What is it?

Simply put, this duct is a high-performance "sandwich." It consists of a rigid Polyurethane (PU) foam core, which acts as a powerful insulator, sandwiched between two layers of corrosion-resistant aluminum foil. Unlike traditional sheet metal ducts that need separate external insulation, this is a complete, ready-to-install system.

Outer Layer: Thick aluminum foil (corrosion-resistant).

Core: High-density, closed-cell Polyurethane (PU) foam (the insulator).

Inner Layer: Smooth aluminum foil (hygienic, low air resistance).

Instead of fabricating metal ducts and then wrapping them with fiberglass or rubber insulation on-site, you cut, fold, and seal this single board to form a complete duct system.

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Why Choose PU Aluminum Pre-insulated Duct?

Here is the value we deliver to your business:

1. Superior Energy Efficiency

The Problem: Traditional metal ducts lose 15-30% of energy through thermal conduction.

Our Solution: The high-density PU foam has a very low thermal conductivity (as low as 0.022 W/m·K). This keeps the cold air in and the hot air out, slashing your electricity bills.

2. Ultra-Lightweight & Easy Installation

The Problem: Steel ducts are heavy, requiring heavy lifting equipment, welding, and large work crews.

Our Solution: This product is 1/10th the weight of sheet metal. You can cut it with a standard knife and assemble it with special aluminum tape or brackets. This dramatically speeds up installation, reduces labor costs, and is safer for workers.

3. No Condensation (No Sweating)

The Problem: In humid environments, cold metal ducts "sweat," causing water damage to ceilings and mold growth.

Our Solution: Because the insulation is integrated and seamless, the outer surface of the duct stays at room temperature. Zero condensation. Zero mold.

4. Built to Last in Harsh Conditions

Corrosion Resistance: Unlike galvanized iron that rusts, aluminum naturally resists moisture, chemicals, and salt air.

Strength: Despite being light, the rigid PU foam gives it high compressive strength. It doesn't sag or tear like fiberglass blankets.

5. Clean & Quiet

Air Quality: The smooth aluminum interior surface prevents dust accumulation and bacterial growth. It does not release fibers into the air.

Acoustic Comfort: The PU foam core acts as a sound barrier, absorbing the "whooshing" noise of the air handler, making your building quieter.

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Quick Comparison of PU Aluminum Pre-insulated Duct Over Metal Ductwork

Feature	Traditional Metal + Fiberglass	PU Aluminum Duct
Weight	Heavy	Lightweight (90% lighter)
Installation	Slow (Fabrication + Wrapping)	Fast (Cut & Assemble)
Thermal Loss	High	Very Low
Corrosion	Prone to rust	Rust-proof
Safety	Sharp edges, itchy fibers	Smooth, safe edges

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Why choose UNTDuct

UNT Pre-insulated Ductwork

What is UNT Duct System

UNT Duct System

PRE-INSULATED DUCT vs G.I. DUCTWORK

Metric	20mm PU Pre - Insulated Duct (with 0.08mm Alu. Foil, )	0.5mm G.I Duct + 30mm Rubber Plastic (40-90kg/m³)
Fire Safety	Compliant (Class 0/BS 476, AS 1530.3). Self-extinguishing PU core, low toxic smoke, non-combustible alu foil.	G.I non-combustible; rubber plastic fire-retardant but requires coating to meet strict codes.G.I
Thermal Insulation	Excellent. λ=0.020 W/m·K, no thermal bridging. 20mm integrated structure ensures consistent insulation.	Fair. λ=0.035 W/m·K, thermal bridging at G.I joints. 30mm insulation offset by metal conductivity.
Hygiene & Air Quality	Superior. Non-porous alu foil, smooth inner surface, moisture-resistant PU. Meets cleanroom/hospital standards.	Poor. Porous rubber plastic traps dust/mold; G.I-insulation gaps breed pathogens.
Lightweight	1.4-1.5 kg/m². Ultra-light, reduces structural load; ideal for retrofits/timber-framed buildings.	5.1–6.3 kg/m². Heavy G.I base + bulk insulation; requires reinforced supports.
Energy Efficiency	Excellent. 20–30% lower HVAC energy consumption. Minimizes heat gain/loss in conditioned air.	Low. 20–30% higher energy loss due to inferior insulation and thermal bridging.
Ease of Construction	Easy. Factory-prefabricated tongue-and-groove joints. No separate insulation step; 40–60% less labor time.	Complex. Two-step on-site process: G.I duct fabrication + rubber plastic wrapping. Labor-intensive, prone to gaps.
Quiet Operation	Good. PU core absorbs 10–15 dB airflow noise; alu foil dampens vibration.	Fair. Rubber plastic provides basic sound reduction, but G.I vibration and insulation gaps reduce efficiency.
Space Savings	Excellent. 20mm total thickness (all-in-one). Fits tight ceilings/retrofit cavities.	Poor. 30.5mm total thickness (0.5mm G.I + 30mm insulation). Bulky, requires larger installation space.
Environmental Friendliness	Balanced. CFC/HCFC-free PU, recyclable alu foil. 20–30-year lifespan; net carbon positive in 1–3 years.	Low. Rubber plastic non-recyclable; 10–15-year lifespan. Frequent replacement increases waste; higher energy emissions.
Air Leakage	Superior. ≤2% air leakage (EN 1507, AS/NZS 3660.1). Airtight factory joints + alu foil vapor barrier.	Poor. 5–10% air leakage. On-site sealing gaps; separate vapor barrier required.

Performance comparison based on UNT Duct product data and standard system configurations. Actual performance may vary depending on system design, installation method and project conditions.

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