Flexible since 1996
From a small workshop in 1996 to a global flexible duct manufacturer with facilities in China and the United States — our story is built on engineering, quality, and relentless innovation.
Our locations
Our facilities in China, the United States and Australia let us respond faster to distributors and contractors, wherever they are.
- Houston, Texas - Manufacturing & Sales4,300 sq ft facility. Local manufacturing for US market. Spiral duct production. Key engineering team on-site.
- Dongyang, China - Headquarters & Main Factory60+ workers, 6 production lines, all equipment self-designed. Full product range manufacturing. R&D center. HVAC rigid parts: airwiseparts.com
- Sydney, Australia - Sales & DistributionEstablished sales team serving the Australian and Oceania market. Local warehouse for fast delivery.
Our history
- 1996
- Industry Entry. Founder begins career in building materials and plastic tubing in Beijing.
- 2003
- First Flex Duct Production. Launched aluminum foil flexible duct manufacturing. First US client secured through supplier referral.
- 2008
- Dongyang Factory Built. Established our own manufacturing base in Dongyang, Zhejiang — taking full control of quality and production.
- 2010
- Dongyang Hstube Co., Ltd Founded. Formally incorporated. Expanded product line to cover insulated ducts and industrial hoses.
- 2016
- Production Equipment R&D. Began designing and building our own production machinery. Today, all 6 production lines run on self-developed equipment.
- 2021
- UL Certification Started. Initiated UL listing process — one of only 3 factories in China pursuing this certification for flexible ducts.
- 2024
- US Expansion. Registered US company. Secured 4,300 sq ft manufacturing facility in Houston, Texas.
- 2026
- Houston Factory Operational. US manufacturing facility becomes operational. Equipment shipped from China, key engineers relocated to Houston.
Why we’ve grown
Hstube's founder started in the building materials industry in 1996. With a background in architecture and a passion for mechanical engineering, he began manufacturing aluminum foil flexible ducts in 2003 — initially supplying a single American client who discovered us through a supplier referral.
That first order grew into regular shipments of 3 containers every two months. By 2008, recognizing that quality control required hands-on manufacturing, we built our own factory in Dongyang, Zhejiang — in the heart of China's industrial manufacturing region.
What sets us apart is our engineering DNA. Every production line — all 6 of them — runs on equipment we designed and built ourselves. When we needed a specialized cutting machine, we didn't buy one from Korea; we reverse-engineered and improved it. This in-house capability means we can manufacture to tighter tolerances and accommodate custom requests that other factories cannot.
Today, we serve contractors, distributors, and OEM partners in over 60 countries, with a new manufacturing facility in Houston, Texas bringing us closer to the US market we've served for over two decades.
Manufacturing capability
Self-Designed Equipment
All 6 production lines run on machinery we designed and built. No dependency on third-party equipment makers.
Full In-House Process
Sheet metal fabrication, powder coating, painting, injection molding (subcontracted), and CNC machining — all under one roof.
Custom Manufacturing
Custom diameters from 1" to 48", custom lengths, custom insulation values. From prototype to container in 30–45 days.
Quality Control
In-process inspection at every stage. Final QC before shipping. UL 181 compliance testing. Consistent quality across batches.