Name: Fireproof PIR Ducting Suppliers and Manufacturers - China Factory - UNT Duct
Brand: UNTDuct
SKU: 312034419

Thanks to its excellent products and quality services, UNT Duct is one of the leading fireproof pir ducting 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.

Fireproof PIR Ducting

UNTDuct Fireproof PIR Ducting is a premium solution for high-efficiency ventilation and HVAC systems.

Built around a rigid PIR foam core with double-sided aluminum foil layers, the panel achieves excellent thermal resistance to block heat transfer and maintain steady duct temperatures.

Apart from reliable thermal insulation, it features great durability to withstand harsh operating and environmental conditions for long-term stable service.

Thanks to its innovative design, the panel greatly reduces energy loss, improves the overall efficiency of HVAC equipment, and helps users save operational costs while lessening environmental impact.

As an essential component for modern ventilation systems, UNTDuct perfectly combines excellent insulation performance, long service life and remarkable energy-saving benefits.

These panels adopt a composite sandwich structure:

Core Material The insulating core is rigid PIR foam. It delivers high thermal resistance and structural rigidity whilst maintaining a lightweight profile.

Facings Protective, airtight facings are permanently bonded to both sides of the foam core. Two common options are available:

Aluminum Foil: Standard 80-micron foil, ideal for general indoor applications.

Aluminum Sheet: 200-micron sheet offering enhanced strength and durability, suited for outdoor installations.

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Key Properties of Fireproof PIR Ducting

The PIR foam core is what sets this panel apart-it delivers performance that outperforms many traditional insulation materials. Its critical properties include:

Exceptional Thermal Insulation:

PIR foam has a lower thermal conductivity which means more thermal efficiency.

Closed-Cell Structure:

Unlike open-cell foams, PIR's closed cells trap air (and thus heat) and repel moisture. This prevents mold growth, corrosion, and insulation degradation over time.

Low Water Absorption:

Typically <1% by volume (ASTM standards), making it ideal for humid environments (e.g., basements, kitchens, or tropical climates).

Fire Resistance:

PIR foam is inherently fire-retardant (meets global standards like ASTM E84, EN 13501-1). It self-extinguishes when exposed to flame and produces minimal toxic smoke-critical for HVAC safety (ducts act as "chimneys" in fires).

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What is the expected lifespan of Fireproof PIR Ducting?

Fireproof PIR Ducting: 20+ years of service life under standard indoor conditions.

Standard lifespan: 20+ years (indoor, commercial/normal industrial, proper installation & maintenance).

Conservative range: 15–20 years (humid coastal areas, moderate industrial exposure).

Core durability factors

Closed-cell PU foam core: resists moisture, mold, and degradation.

Double-sided aluminum foil: corrosion-resistant, non-combustible, and aging-resistant.

Fully sealed joints: minimal air leakage, stable thermal performance over time.

Compared with traditional ducts

GI ducts (with insulation): 5–10 years (prone to rust, insulation failure).

Flexible ducts: 10–15 years.

PIR Foam Pre-insulated Duct board:20+ years

Maintenance tip Annual visual inspection and cleaning of the outer surface keep it performing well for 20+ years

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On-Site Fabrication Process of Fireproof PIR Ducting

1. Tracing/marking

2. Cutting

3. Applying Glue

4. Folding

5. taping

6. Installing Flanges

7. Applying Silicone Sealant

8. Reinforcement

Why choose UNTDuct

UNT Pre-insulated Ductwork

Packaging and Loading of UNT Duct Panel

Packing of Duct Panel

Specification

Item	Unit	Specification
Standard Panel Size	mm	3950x1200x20
Alu. Foil Thickness	mm	0.06 or 0.08
Foam Density	kg/m³	50-55
Fire Safety (BS476Part 6&7)		Class 0
Thermal Conductivity	W/(m·K)	0.020
Compressive Strength	MPa	0.2
Bending Strength	MPa	2
Water Absorption	%	0.36
Dimension Change	%	0.3
Working Temperature	℃	-60 to +80
Max Pressure in duct	Pa	1500
Maximum Allowable Wind Velocity	m/s	≤15
Max Continuous Running Temperature	℃	≤70
Lifespan of PIR Air Duct	years	>20

PRE-INSULATED DUCT vs G.I. DUCTWORK

Metric	20mm PIR 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 PIR 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 PIR. 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. PIR 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 PIR, 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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