| Product Description
Ventilation Tunnel Pipe is a double-wall corrugated air duct with a near-oval cross-section, specifically developed and designed for underfloor air supply systems. The pipe wall features a double-wall hollow corrugated structure, combining excellent pressure resistance, thermal insulation, noise reduction properties, and flexible bending characteristics. Ventilation Tunnel Pipe requires an installation height of only 53mm, allowing it to be easily embedded into a cement mortar screed or between joists, eliminating the need for drilling beams and significantly reducing building safety risks. Used in conjunction with dedicated conversion joints, elbows, outlet adapters, and other accessories, it is widely applied in underfloor fresh air systems for residences, villas, and commercial spaces.
| Product Features
● Ultra-thin design, installation height of only 53mm: The unique oval cross-section design requires an installation height of only 53mm, allowing it to be easily embedded into a 7-8cm thick cement mortar screed, enabling underfloor air supply without the need for dropped ceilings.
● HDPE eco-friendly virgin material, antibacterial and anti-static: Ventilation Tunnel Pipe is made from food-grade HDPE raw material, enhanced with antibacterial and anti-mold masterbatch to prevent contamination, and anti-static masterbatch to prevent dust adhesion, ensuring the air delivered indoors is pure and healthy.
● Double-wall hollow structure, pressure-resistant, insulating, and noise-reducing: The double-wall corrugated structure distributes pressure on the pipe, making it resistant to deformation even under heavy loads. The hollow layer provides both thermal insulation and soundproofing, reducing heat/cooling loss and noise transmission.
● Flexible and bendable, continuous pipe runs: The corrugated structure provides excellent flexibility, allowing the pipe to adapt to complex floor layouts, reducing the number of joints needed, and minimizing the risks of air leakage and secondary contamination.
● Ceiling/floor combination, flexible adaptation: Used with dedicated fittings like horizontal round-to-shield and 90° round-to-shield adapters, seamless conversion between PE round pipes and shield pipes can be achieved, meeting the requirements of different installation scenarios.
I Technical Specifications
Parameter Item | Ventilation Tunnel Pipe and Fittings |
Product Material | High-Density Polyethylene (HD-PE), 100% Eco-friendly Virgin Material |
Product Structure | Double-wall Corrugated Structure, Arch-shaped Cross-section |
Cross-section Dimensions | 132mm × 52mm |
Operating Temperature Range | -20°C ~ 60°C |
Connection Method | Socket Connection, No Adhesive Required |
Special Properties | Antibacterial, Mold-resistant, Anti-static |
I System Components
Component Category | Main Varieties | Functional Characteristics |
Main Pipeline | Ventilation Tunnel Pipe | Specifically for underfloor air supply, ultra-thin design, pressure and impact resistant. |
Conversion & Connection Class | Horizontal Round-to-Shield, 90° Round-to-Shield | Achieves seamless conversion between round pipes and flat pipes. |
Direction Change Class | 90° Elbow | Adapts to changes in floor layout; positive and negative bends can be paired for bridge-style installation. |
Connection & Extension Class | Sealed Connector | Extends pipe length, rubber-sealed for zero air leakage. |
Terminal Connection Class | Indoor Outlet Adapter | Connects shield pipe to indoor air supply outlet. |
Fixing Class | Shield Pipe Metal Pipe Clamp | Secures pipe position, ensures long-term stability. |
| Product Specification
| Application
● Underfloor Fresh Air Systems: In residences and villas, employing a "floor supply, ceiling return" design to achieve displacement ventilation, where fresh air is supplied from the floor and stale air is exhausted from the ceiling.
● Spaces Without Dropped Ceilings: Enables installation of fresh air ducts without extensive dropped ceilings, preserving the advantage of ceiling height.
● Embedded in Concrete: The shield pipe can be directly cast into concrete, offering excellent pressure resistance.
● Installation Between Joists: Suitable for the space under joists for wood flooring or tiles, providing flexible installation.
I Comparison with Other Fresh Air Duct Materials
Comparison Aspect | Ventilation Tunnel Pipe | Ventilation Corrugated Round Pipe | PVC Rigid Pipe |
Suitable System | Dedicated for underfloor air supply | Ceiling supply / General purpose | Ceiling supply |
Installation Height | Only 53mm, can be buried | Requires dropped ceiling or exposed installation | Requires dropped ceiling |
Beam Drilling | No drilling needed, safe | Requires drilling through beams | Requires drilling through beams |
Pressure Resistance | Excellent, can be cast in concrete | Good | Good |
Flexibility/Bending | Good, adapts to floor layout | Excellent, can bend slightly | Rigid, requires elbow fittings |
Environmental & Hygiene | Food-grade HDPE, antibacterial, anti-static | Food-grade HDPE | Contains heavy metal stabilizers |
Connection Method | Socket with gasket, no adhesive | Socket with gasket | Adhesive bonding, formaldehyde risk |
I FAQ
1. What is Ventilation Tunnel Pipe ? Why is it called a shield pipe?
Ventilation Tunnel Pipe is a double-wall corrugated air duct with an oval cross-section. It gets its name because its shape and installation method are similar to the shield tunneling method used in tunnel construction. It is specifically designed for underfloor air supply systems, can be directly embedded in the floor screed, requires no dropped ceiling, and has an installation height of only 53mm.
2. What is the difference between Ventilation Tunnel Pipe and Ventilation Corrugated Round Pipe? How to choose?
The Ventilation Tunnel Pipe has a flat oval cross-section, low installation height (53mm), and is suitable for underfloor air supply systems. It can be embedded in the floor screed, eliminating the need for beam drilling. The PE round pipe (Ventilation Corrugated Round Pipe) has a circular cross-section, is suitable for ceiling air supply systems, and requires installation in a dropped ceiling. Selection advice: Choose the shield pipe if you need to preserve ceiling height and use a "floor supply, ceiling return" design. Choose the PE round pipe for a "ceiling supply, ceiling return" design.
3. What accessories are needed to complete the installation of a shield pipe (Ventilation Tunnel Pipe) system?
The shield pipe (Ventilation Tunnel Pipe) system requires the following accessories: ① Horizontal Round-to-Shield / 90° Round-to-Shield – connects PE round pipe to shield pipe; ② 45° Positive/Negative Bend – allows for direction changes and bridge-style installation; ③ Shield Pipe Straight Connector – extends pipe length; ④ Indoor Outlet Adapter – connects to the terminal outlet; ⑤ Shield Pipe Clamp – secures the pipe.
4. Since Ventilation Tunnel Pipe is buried in the floor, will it get crushed?
No. Ventilation Tunnel Pipe uses a double-wall corrugated structure that maximally distributes pressure on the pipe, so it will not deform even under heavy loads. It can be cast into concrete, has excellent pressure resistance, and fully meets the load-bearing requirements for underfloor installation.
5. Does the connection of Ventilation Tunnel Pipe require adhesive? Will it leak air?
No adhesive is required. Ventilation Tunnel Pipe and Fittings use a socket connection with a rubber gasket sealing process, achieving a tight seal without adhesive, making it environmentally friendly and pollution-free. The rubber gasket process ensures excellent sealing at the joints, eliminating air leakage issues.
