Most articles about sourcing HVAC components from China are written to persuade you that sourcing from China is a good idea. This one assumes you have already decided, and tries to answer the more useful question: what does China’s HVAC supply landscape actually look like, and where in it does the thing you want to buy get made?
That matters because China is not one supply base. It is a set of regional clusters, each with a different specialisation, a different tier structure and a different mix of genuine manufacturers and intermediaries. A buyer who understands the map shortlists three credible suppliers. A buyer who does not gets forty quotes, most of them from companies that make nothing.
The Market, Correctly Scoped
Before the geography, a word on size, because the figure most often quoted for this sector is quoted wrongly.
The China HVAC field device market is projected at USD 5.72 billion in 2025, growing at a 9.10% CAGR to USD 8.84 billion by 2030.
The important part is the scope. “Field device” means the control layer: control valves, balancing valves, pressure independent control valves, dampers and damper actuators, and the sensor set. It does not include air conditioners, chillers or heat pumps as finished equipment, which are a much larger market again.
That distinction is worth holding onto, because the field device segment behaves differently from the equipment segment. It is driven by building energy performance requirements rather than by consumer appliance demand, it is less exposed to retail cycles, and its growth comes from the retrofit of existing buildings as much as from new construction. A balancing valve gets specified because a building has to hit an energy target, not because somebody wanted a cooler bedroom.
It is also the segment most of the companies described in this article actually occupy, including ours.
Where Things Are Actually Made
Chinese manufacturing is organised into industrial clusters, and the clusters are specialised to a degree that surprises people new to sourcing. A town can account for a large share of national output in one product category, with the entire upstream chain inside a short drive.
For HVAC, the map breaks down roughly as follows.
Zhejiang and Jiangsu: Valves, Fittings and Hydronics
This is the heart of the component industry, and it is where the water side of HVAC is made: valves, manifolds, actuators, fittings, pumps and underfloor heating components.
Within it, Yuhuan in Zhejiang is one of the country’s principal valve manufacturing bases, with brass forging, machining and plating capacity concentrated in the same area. Yongkang is known for hardware more broadly. Our own facility is in Jiaxing, in northern Zhejiang, within the Shanghai economic belt.
If you are buying HVAC valves, manifolds, thermal actuators or floor heating pipe, this is where it comes from.
Guangdong: Air Conditioning and Electronics
The Pearl River Delta is where finished air conditioning equipment and anything with significant electronic content is concentrated. The large domestic appliance brands are based here, along with the PCB assembly, injection moulding and consumer electronics supply chain that supports them.
Control products with meaningful electronics, such as smart thermostats, often draw on this chain even when the mechanical parts come from Zhejiang.
Shandong, Anhui and the North
Heavier equipment, some heat pump assembly, and a growing share of industrial-scale HVAC. Lower cost base than the coastal belt, generally longer lead times on anything requiring a dense sub-supplier network.
Why This Matters for a Quote
Here is the practical use of the map. A supplier offering you brass manifolds from Guangdong and air purifiers from Zhejiang is almost certainly making neither. Specialisation is geographic, and a quotation that ignores the geography is a quotation from an intermediary.
It is one of the fastest sanity checks available, and it costs nothing to apply.
How the Supply Chain Is Structured
Three layers, and knowing which one you are talking to changes everything about the conversation.
Brand Assemblers
At the top, companies producing finished equipment under their own brand. They buy components, assemble, certify and distribute. Large, process-driven, generally uninterested in small orders or custom work.
Component Manufacturers
The middle layer, and the one most export buyers actually deal with. These companies make a defined product family and sell it to assemblers, to distributors, and directly to export buyers under OEM and ODM arrangements. They own tooling, they employ engineers who can discuss material grades, and they can develop to a specification.
Sub-Suppliers
Underneath, the forgers, platers, moulders and machining shops. You rarely deal with them directly, but their proximity is the thing that makes a component manufacturer fast. A tooling change that takes six weeks elsewhere takes ten days when the mould shop is forty minutes away.
And the Fourth Category: Trading Companies
Running alongside all three, trading companies buy and resell. They are not fraudulent, and a good one earns its margin by consolidating a mixed order across several factories so you deal with one invoice instead of six.
What you lose is control. You cannot walk the line, you cannot sit with the engineer who will change the tool, and a correction passes through an intermediary with no technical stake in getting it right.
The cleanest way to tell which you are dealing with is the business licence. Every legally operating Chinese company has one and it is not confidential. Read the scope of business field: a manufacturer’s scope includes production, a trading company’s lists wholesale, retail or import and export with no production language at all. That one field settles the question faster than any amount of email.
A second free test: ask a question only production can answer. What glass fibre content is the actuator housing, and why. Is the brass CW617N or CW602N, and what does the dezincification behaviour mean for the destination water chemistry. A manufacturer answers in a day, sometimes correcting your assumption. An intermediary goes quiet for three days and returns a paraphrase. Our note on HVAC valve materials covers why those grade questions matter.
What Changed in the Last Decade
The reason to understand the current landscape is that the old mental model of it is wrong, and buyers acting on the old model make poor supplier choices.
China is no longer the low wage option. Manufacturing wages along the coastal belt, which is where the HVAC component industry sits, are now substantially above Vietnam, Indonesia, India and Bangladesh. If labour cost were the only variable, this industry would have left.
What it competes on is cluster density. Within a short drive of a component plant in northern Zhejiang there are brass forgers, plating lines, injection moulders, wax element producers, PCB assembly, packaging printers and three container ports. That proximity is what produces short development cycles and fast response to engineering changes, and it is very difficult to replicate.
The export mix moved upmarket. Fifteen years ago the export story was volume at low specification. Today a substantial share of output is certified to destination market standards, with Declarations of Conformity, market-specific potable water approvals and documentation packs issued per model. That shift is what made Chinese components acceptable in regulated European and North American projects, and it is the real competitive change.
The domestic market became a driver rather than a sideshow. China’s own uptake of heat pumps, underfloor heating and building energy management created domestic demand that funds development. Products developed for the Chinese market now get exported, rather than the reverse.
Regulation drives the field device segment. Building energy performance requirements, both in China and in export markets, are what create demand for balancing valves, PICVs and control devices. Our note on innovation trends in valve design covers where that is heading, and HVAC dampers covers one of the device categories in scope.
The Trade-Offs, Stated Plainly
Supplier websites in this category tend to list advantages and then say nothing specific about the drawbacks. That is not useful, so here are the real ones.
Minimum order quantities. Driven by material batch size, packaging print runs and production scheduling rather than by preference, which is why the productive question is what drives the MOQ rather than whether it can be lowered. Levers exist: accept standard colour and packaging, combine SKUs into one run, or place a blanket order with staged releases.
Lead time and distance. Production typically 25 to 45 days after specification sign-off, plus 30 to 40 days sea freight to Northern Europe and 18 to 30 to the US West Coast. That is six to twelve weeks before anything reaches you, and it has to be planned for rather than discovered.
Chinese New Year. Production stops for two to four weeks with a slowdown before and a staffing ramp after. Orders that must land in Q1 are placed in November, not January. This single factor causes more missed deadlines than every quality issue combined.
Intellectual property. China operates first to file on trademarks, so your home registration gives you nothing locally. Tooling ownership does not transfer because you paid for it; the contract has to say so. And a Western-style NDA is weak in practice, where an NNN agreement under Chinese law with a named Chinese court and a stated penalty is enforceable.
Communication and time zone. Workable, and translation is no longer the barrier it was, but a specification that relies on implication rather than written tolerances will be built to the supplier’s interpretation, not yours.
Classification and duty. Landed cost, not FOB price, is what you are actually comparing, and the tariff classification applied at destination moves it. Our guide to HS codes for HVAC products sets out the classifications for this product set.
None of these are reasons not to source from China. They are reasons to plan for it properly, and a supplier who will not discuss them openly is telling you something.
Where Legom Sits in This Landscape
Specifically, so you can place us on the map above.
Jiaxing Legom Technology Co., Ltd. is a component manufacturer in the Zhejiang hydronics cluster, in the field device segment rather than the finished equipment segment. We supply more than 90 countries.
What we make: thermal actuators and the wax thermostatic elements inside them, underfloor heating manifolds in stainless steel and brass, HVAC and safety valves, room thermostats and wiring centres, oxygen barrier floor heating pipe, air to water heat pumps and air purifiers.
One thing worth stating because it affects what we can do for a customer: we manufacture our own wax thermostatic elements rather than buying them in. That is why we can hold actuator response consistent across a production run and develop an element to a specific temperature curve rather than selecting the nearest catalogue part.
We work on OEM and ODM terms through our OEM and ODM service, covering tooling, material specification, private label packaging and documentation packs per destination market. If you are still deciding which arrangement fits, our explainer on what ODM means sets out the difference. We are also an Alibaba verified factory, meaning the licence and premises have been independently inspected rather than self declared.
For more on our manufacturing position, see HVAC manufacturing in China, and on the supplier relationship, the role of valve suppliers in your supply chain and what to know about an HVAC supplier.
A Short Sourcing Checklist
Drawn from the landscape above, in the order we would work through it:
- Check the geography. Does the product category match the cluster the supplier is in?
- Get the business licence and confirm the scope of business includes production.
- Confirm the bank account name matches the licence exactly. Payment to a personal account or a differently named entity is the most common pattern in sourcing fraud.
- Ask one engineering question and judge the reply.
- Request the Declaration of Conformity naming directives and harmonised standards, with the test reports behind it, plus any market-specific approvals for your destination.
- Have the MOQ explained in terms of material batch or setup.
- Settle tooling ownership in writing, with amortisation and the tool identification number.
- File the trademark in China and use an NNN agreement in Chinese.
- Build Chinese New Year into the schedule.
- Compare on landed cost, with the destination tariff classification confirmed.
Frequently Asked Questions
How big is China’s HVAC field device market?
Projected at USD 5.72 billion in 2025, growing at a 9.10% CAGR to USD 8.84 billion by 2030. Note the scope: field devices means control valves, balancing valves, PICVs, dampers, damper actuators and sensors. Air conditioners, chillers and heat pumps as finished equipment are a separate and much larger market.
Where in China are HVAC valves and manifolds made?
Predominantly Zhejiang and Jiangsu, with Yuhuan in Zhejiang among the principal valve manufacturing bases and the brass forging, machining and plating chain concentrated nearby. Finished air conditioning equipment and anything with heavy electronic content comes from Guangdong instead.
How do I tell a factory from a trading company?
Read the scope of business on the business licence. A manufacturer’s scope includes production; a trading company’s lists only wholesale, retail or import and export. Then ask a detailed engineering question and time the reply.
Is China still the cheapest place to manufacture HVAC components?
Not on labour. Coastal manufacturing wages are now well above Vietnam, Indonesia, India and Bangladesh. What China competes on is cluster density: the entire upstream supply chain within a short drive, which produces short development cycles and fast tooling changes that are hard to replicate elsewhere.
What is the biggest planning mistake buyers make?
Ignoring Chinese New Year. Production stops for two to four weeks with a slowdown either side, so stock needed in Q1 has to be ordered in November. It causes more missed deadlines than quality problems do.
Does a Chinese supplier’s CE certificate mean the product is compliant?
Not on its own. For most HVAC components CE marking is a manufacturer self declaration, so what you need is the signed Declaration of Conformity naming the applicable directives and harmonised standards, with test reports behind it. A one-page document headed “CE Certificate” from a test house is not that.
Who owns the tooling if I pay for it?
Only whoever the contract says. Ownership does not transfer automatically because you funded it. Get a written clause stating ownership, the amortisation, your right to transfer the tool, and the tool identification number.
Should I compare suppliers on FOB price?
No, on landed cost. Freight, insurance, duty and the tariff classification applied at destination can move the real number by more than the unit price difference between two quotes.
Reviewed by Maggie Shen, Director at Legom, on October 18, 2026. This article was reviewed for accuracy, including the correct scope and current figures of the China HVAC field device market, the regional specialisation of Chinese HVAC component manufacturing, the business licence scope of business test for distinguishing manufacturers from trading companies, the shift in China’s competitive basis from labour cost to cluster density, and the CE Declaration of Conformity requirement.