Suzhou Tongbei Technology Co., Ltd.
Spiral Duct & HVAC Ductwork | Modular Building Supplier
Spiral Duct & HVAC Ductwork | Modular Building Supplier
Suzhou Tongbei Technology Co., Ltd. supplies spiral air duct and complete HVAC ductwork systems complying with DW/144 and DW/143 standards, plus prefabricated modular buildings for global B2B clients. From high-quality ductwork to modular housing, we provide one-stop sourcing, custom design, export documentation and reliable after-sales support.
Core Product Lines
Suzhou Tongbei Technology focuses on spiral air duct and complete HVAC ductwork solutions for construction, industrial ventilation, mining camps and temporary site projects worldwide. Our ductwork follows BESA DW/144 fabrication specification and DW/143 air leakage test standard, with complete accessories to meet all ventilation layout requirements.
High-performance spiral air duct system for ventilation, air conditioning, exhaust and dust removal. Widely used in factories, commercial buildings, clean rooms and industrial projects. Our spiral duct system is manufactured in accordance with BESA DW/144 specification for sheet metal ductwork, covering material selection, fabrication, joint sealing and pressure classification. Air tightness performance can be tested and verified per DW/143 leakage standard. Tongbei supplies a full portfolio of duct accessories including straight duct, elbows, reducers, tees, insulated components, volume control dampers, non-return dampers, silencers and duct clamps to complete your air system.
Basic galvanized spiral air duct for ventilation, exhaust and air conditioning systems.
90° / 45° spiral duct elbow fitting for changing airflow direction in duct systems.
Concentric / eccentric reducer for transition between different duct diameters.
T-shaped branch fitting, used to split or combine airflow inside ventilation network.
Straight spiral duct wrapped with thermal insulation layer, anti-condensation & energy saving.
Insulated duct elbow for bent sections, keeps temperature stable and prevents condensation.
Circular / rectangular air volume regulating valve for precise airflow control in duct systems.
Backdraft check damper that prevents reverse airflow in ventilation and exhaust ducts.
Cylindrical sound attenuator that reduces fan and airflow noise in HVAC systems.
Galvanized steel band clamp with tightening screw, used to secure spiral duct connections.
Rectangular galvanized steel air duct with flanged ends for square duct systems.
Rectangular 90° duct elbow fitting for changing airflow direction in square duct systems.
Prefabricated modular building units for site offices, worker dormitories, temporary accommodation, clinics and site facilities. Fast installation and reusable for different project sites.
Why Tongbei
We focus on spiral duct and HVAC ductwork, and combine complementary building products under Suzhou Tongbei Technology to simplify your global project procurement.
All inquiries, quotations, order coordination and after-sales handled by Tongbei’s export team.
Ductwork fabricated to BESA DW/144 specification with air leakage verified per DW/143 standard.
We prepare packing list, commercial invoice, and all documents required for sea freight export.
We support combined orders for both ductwork and modular building for your integrated construction projects.
About Us
We are a professional supplier dedicated to the overseas market, based in Suzhou, China, specializing in supplying high-quality products that fully comply with international standards. Our core product portfolio centers on complete spiral air duct and HVAC ductwork systems with full accessories, and also covers prefabricated modular buildings. Our spiral air duct series can be manufactured to meet BESA DW/144 sheet metal ductwork specification, and air tightness can be tested in accordance with DW/143 air leakage standard, widely accepted for UK, Singapore and many international construction projects.
With rich experience serving global engineering and construction clients, we focus on one-stop procurement service for overseas projects. Whether your project requires ventilation duct systems complying with DW/144 & DW/143, or modular accommodation units, we can provide tailored product solutions according to your technical parameters and local code requirements.
We implement strict quality control before shipment for all goods. Our export team handles all logistics and documentation work, including commercial invoices, packing lists, and other customs clearance files. We support mixed container shipments combining spiral duct products and modular building components, helping buyers consolidate orders and save procurement & shipping costs.
Our mission is to become your reliable long-term Chinese supplier. We respond quickly to inquiries, provide clear technical data sheets, and offer consistent after-sales support for all exported products.
Contact Our TeamContact Us
Please tell us your required product, specifications, quantity and project details. Our Tongbei team will reply promptly.
Suzhou Tongbei Technology Co., Ltd.