Top 10 HVAC Parts Manufacturers in China [2026 Verified Factory List]

Why China Is a Leading Source for HVAC Parts

China's dominance in HVAC component manufacturing is not accidental. It is the result of three structural advantages that are difficult for other countries to replicate.

Vertically integrated supply chains. In manufacturing clusters like Ningbo, Dongyang, and Foshan, raw material suppliers (galvanized steel coils, aluminum extrusions, copper tubing) sit within a 50 km radius of finished goods factories. This proximity reduces material lead times from weeks to days and eliminates international shipping costs on raw inputs. A galvanized steel coil purchased in Ningbo reaches a duct factory in Dongyang within 24 hours.

Cost efficiency at scale. Chinese HVAC parts factories operate at 30-50% lower cost than equivalent facilities in North America or Europe. This is not just about labor rates — it is about tooling amortization across enormous volumes, government-subsidized industrial park infrastructure, and shared logistics networks that reduce per-unit shipping costs. A standard 4-way ceiling diffuser that costs $18-25 from a US manufacturer wholesales at $6-9 FOB from a certified Chinese factory.

Product range breadth. The Zhejiang HVAC manufacturing cluster alone hosts factories producing spiral ducts, pressed duct fittings, aluminum grilles and diffusers, copper line sets, rubber insulation, dampers, plenum boxes, and installation hardware. A buyer sourcing from this region can fill an entire container with products from two or three factories located within a one-hour drive of each other, simplifying consolidation and inspection logistics.

According to China Customs data, HVAC component exports exceeded $4.2 billion in 2025, with the United States, Australia, the Middle East, and Southeast Asia as the top destination markets. The trend shows 8-12% year-over-year growth, driven by global construction activity and the replacement cycle of aging HVAC infrastructure in developed markets.

How We Selected These Manufacturers

This is not a list compiled from Alibaba search results. Each manufacturer was evaluated against five criteria, with data sourced from factory visits, export records, certification databases, and direct buyer interviews.

Product range measures how many HVAC component categories a manufacturer covers in-house. Specialists score lower but may excel in depth. Certifications weighs international standards: UL, CE, M1, AWTA, and ROSH. Export track record considers years of continuous export, number of destination countries, and customs-verified shipment volume. Factory scale evaluates production area, employee count, and production line count. OEM/custom capability assesses whether the manufacturer can produce to buyer specifications, including private labeling, custom sizing, and modified materials.

At-a-Glance Comparison Table

Detailed Factory Profiles

1. Ventech HVAC — Yingde Ventech Air Conditioning Co., Ltd (chinaventech.com)

Location: Foshan, Guangdong Province.Founded: 2009.Employees: 200+.Factory area: 40,000 m².

Company Profile

Ventech is one of the largest dedicated air distribution product manufacturers in China. With over 15 years of production experience and exports to more than 150 countries, they have established a strong reputation in the commercial HVAC segment. Their Foshan location places them in the heart of Guangdong's manufacturing ecosystem, nicknamed the "Hometown of Aluminum in China."

Core Products

• Diffusers: Square ceiling diffusers, linear slot diffusers, swirl diffusers, jet nozzle diffusers, and perforated panel diffusers.
• Grilles: Egg crate grilles, linear bar grilles, double deflection grilles, and fixed-blade return air grilles.
• Louvers and dampers: Weather-proof louvers, volume control dampers, and opposed blade dampers.

Production Capacity & MOQ

The 40,000 m² factory and 200+ workforce give Ventech significant production throughput. They operate multiple aluminum extrusion, stamping, and powder coating lines. MOQ is typically 200-300 pieces per model for standard catalog items, with OEM/ODM orders starting at 500 pieces.

Certifications

ISO 9001 quality management system. Products sold to 150+ countries. B2B presence on Made-in-China (Diamond Member) and Alibaba (Audited Supplier).

Best for: Buyers who need large volumes of diffusers and grilles specifically. Ventech's depth in air distribution products is excellent, though they do not manufacture ducts, copper tubing, or duct fittings, requiring a second supplier for those categories.

2. Biyang HVAC — Buyductings (buyductings.com)

Location: Jiangsu Province.Founded: ~2014.Employees: 50-100 (estimated).

Company Profile

Biyang has built the strongest digital presence among Chinese HVAC exporters, with over 500 indexed pages covering flexible ducts, rigid metal ducts, duct fittings, diffusers, and accessories. Their comprehensive WordPress-based website ranks for 550+ keywords in the US market, making them one of the most visible Chinese HVAC suppliers online. Their products have been used in high-profile projects including Shanghai Disney.

Core Products

• Flexible ducts: Insulated and non-insulated flexible ducts in 4"-20" diameters.
• Rigid ducts: Galvanized steel spiral and rectangular ducts.
• Duct fittings: Elbows, tees, reducers, end caps, and connectors.
• Diffusers and grilles: Ceiling diffusers, linear grilles, and floor registers.

Production Capacity & MOQ

Mid-size factory operation with flexible MOQ starting at 100-200 pieces for standard items. They offer a free sample policy for qualified buyers, which is unusual among Chinese HVAC manufacturers. Lead time is typically 15-25 days for standard products.

Certifications

No international certifications (UL, CE, AWTA) are publicly listed on their website. This may limit suitability for commercial projects that require certified products.

Best for: Small-to-medium distributors looking for competitive pricing on duct products with lower MOQ requirements. The lack of international certifications should be verified before ordering for projects with compliance requirements.

3. Airwise Parts — Dongyang Hstube Co., Ltd (airwiseparts.com)

Location: Dongyang, Zhejiang Province.Founded: 2010 (industry roots since 1996).Employees: 60-80.Factory area: 5,000 m² (Dongyang) + 4,300 m² (Houston, TX).Production lines: 6 self-developed lines.

Company Profile

Airwise is the only manufacturer on this list that offers genuine one-stop HVAC parts supply from a single factory. While most Chinese manufacturers specialize in one or two product categories, Airwise covers 7 complete categories with 744 SKUs: air grilles and diffusers (18 products, 131 SKUs), dampers and zone controls, plenum boxes, ducts and metal fittings, copper pipe and fittings, ventilation and louvers, and installation accessories.

Core Products

• Air grilles and diffusers: Linear bar grilles (300-2500 mm), egg crate grilles, 2/3/4-way ceiling diffusers, slot diffusers, floor registers, and neck adaptors. Aluminum construction with white powder coat or natural anodized finishes.
• Duct fittings: Branch take-offs (single and double), reducers, elbows (45/90 degree), starting collars, boots (unit and side), Y-pieces, and metal joiners in G60 galvanized steel.
• Spiral ducts: Galvanized spiral pipe in diameters from 4" to 24", fabricated at both the Dongyang factory and the Houston, TX facility.
• Dampers: Opposed blade dampers, round butterfly dampers, fire dampers (UL 555), and backdraft dampers.
• Plenum boxes: Standard and insulated plenum chambers for residential and commercial supply/return applications.
• Copper line sets: Pre-insulated copper pipe sets for mini-split and central AC installations.

Production Capacity & MOQ

The Dongyang factory runs 6 self-developed production lines covering stamping, roll-forming, spinning, and welding. Monthly capacity exceeds 50,000 pieces of grilles/diffusers and 10,000 linear meters of spiral duct. MOQ starts at 200 pieces per size for standard catalog items. Mixed-container orders are accepted, allowing distributors to combine products across all 7 categories in a single shipment.

Certifications

Airwise holds certifications that few Chinese HVAC manufacturers can match: UL Listed (one of only 3 Chinese HVAC parts makers with UL), CE (European conformity), M1 (French fire safety rating for air distribution), AWTA (Australian certification, sold under the Airwise Flex brand through the Sydney warehouse), and ROSH compliance. This certification portfolio enables Airwise products to enter the US, European, Australian, and Middle Eastern markets without additional third-party testing.

What Sets Airwise Apart

The combination of product breadth and geographic reach is what differentiates Airwise. The 4,300 m² spiral duct fabrication facility in Houston, TX produces Made-in-USA products with 5-10 day delivery to anywhere in the continental US. The Sydney, Australia trading office and warehouse provides AWTA-certified flexible duct products for the Australian and New Zealand markets. No other Chinese HVAC manufacturer operates production facilities on three continents.

4. GFI HVAC Limited (gfihvac.com)

Location: Zhangping City, Longyan, Fujian Province.Founded: 2011.

Company Profile

GFI HVAC has grown from a small duct production base in Xiamen into a comprehensive HVAC ductwork and ventilation solutions provider. What makes GFI distinctive is their focus on pre-insulated ductwork systems — PU and PIR foam pre-insulated duct panels that eliminate the need for separate insulation wrapping. Their Fujian location places them outside the traditional Zhejiang/Guangdong HVAC clusters, but with good port access via Xiamen harbor.

Core Products

• Pre-insulated ducts: PU/PIR pre-insulated duct panels and foam insulation boards — their flagship product line.
• Spiral ducts: Galvanized steel spiral duct in standard and custom diameters.
• Air distribution: Diffusers, grilles, dampers, and air registers.
• Accessories: Rubber insulation, flexible ducts, copper pipes, and galvanized sheet stock.

Production Capacity & MOQ

GFI operates three dedicated production lines: GI (galvanized iron) duct, spiral duct, and PID (pre-insulated duct) panel manufacturing. They have strategically invested in separate flexible duct and rubber insulation factories, providing integrated supply for large HVAC project orders.

Certifications

ISO 9001. Products supplied to hospitals, airports, stadiums, commercial complexes, and engineering contractors in over 50 countries. Made-in-China verified supplier.

Best for: Project-level buyers who need pre-insulated ductwork systems, particularly for commercial and institutional projects in the Middle East and Southeast Asia where pre-insulated panels are increasingly specified.

5. VAIRtech — Foshan Vairtech Ventilation Co., Ltd (vairtech.com)

Location: Nanhai District, Foshan, Guangdong Province.Founded: 2015 (factory established 2002).Employees: 300+.Factory area: 20,000 m².

Company Profile

VAIRtech is the trading arm of a well-established Foshan factory (XUXING) with over 20 years of air distribution manufacturing history. Located in Nanhai, Foshan — China's aluminum capital — VAIRtech benefits from direct access to aluminum raw material suppliers, reducing material costs and lead times. The 20,000 m² factory and 300+ employee workforce make them one of the larger operations focused specifically on air terminal devices.

Core Products

• Air diffusers: Square, round, linear slot, swirl, and jet nozzle diffusers.
• Grilles and registers: Return air grilles, supply air grilles, bar grilles, and egg crate grilles.
• Access panels: Aluminum and steel access doors for ductwork inspection points.
• Dampers: Volume control dampers and opposed blade dampers.
• Filters: Panel filters and filter grilles for return air applications.

Production Capacity & MOQ

The 300+ person workforce and 20,000 m² factory provide high-volume output capability. VAIRtech supports both ODM and OEM services with professional design and engineering teams. MOQ varies by product but is generally competitive for medium-to-large orders.

Certifications

ISO 9001. Products exported to 25+ countries. The company emphasizes quality control with in-house testing and inspection capabilities.

Best for: Buyers who need high-volume air terminal products (diffusers, grilles, registers) with ODM/OEM customization. The 300+ employee scale and 20-year factory heritage provide production reliability for large orders.

6. Ningbo Aier Ventilation Equipment (jhystamping.com)

Location: Yuyao, Zhejiang Province (near Ningbo).Founded: ~2004.Employees: 100-200.Factory area: 25,000 m².

Company Profile

Ningbo Aier is a large-scale stamping and ventilation manufacturer with one of the biggest factory footprints on this list. Their 25,000 m² factory in Yuyao specializes in precision-stamped HVAC components, with a particular strength in round and circular air terminal devices. Their proximity to Ningbo — one of China's largest container ports — gives them a significant logistics advantage for FOB export shipments.

Core Products

• Iris dampers: Precision iris-type flow control dampers, their signature product.
• Metal air valves: Exhaust and supply air valves in various configurations.
• Swirl diffusers: Ceiling-mount swirl diffusers for commercial applications.
• Stamped HVAC components: Custom stamped metal parts for HVAC system integration.

Production Capacity & MOQ

The 25,000 m² factory houses multiple stamping press lines and CNC equipment. With 100-200 employees and 20+ years of production history, they have the capacity for large-volume stamped component orders. MOQ typically starts at 500 pieces for standard items.

Certifications

ISO 9001 quality management. Established track record supplying European and North American distributors.

Best for: Buyers who need precision-stamped air terminal components, particularly iris dampers and metal air valves. Not suited for buyers needing duct products, copper tubing, or installation accessories.

7. Airandus (airandus.com)

Location: Zhejiang Province.Founded: 2012.

Company Profile

Airandus positions itself as a factory partner for precision-made spiral ducts, dampers, and access doors. Since 2012, they have specialized in sheet metal fabrication for HVAC systems, with a focus on spiral duct and its associated fittings. Their website emphasizes factory-direct supply with customization capabilities for non-standard specifications.

Core Products

• Spiral ducts: Galvanized steel spiral pipe in a range of diameters and gauges.
• Spiral duct fittings: Pressed and welded fittings including elbows, tees, reducers, and branches.
• Dampers: Volume control dampers and fire/smoke dampers.
• Access doors: Duct access doors and panels for inspection and maintenance.
• Ductwork accessories: Hangers, supports, clamps, and hardware.

Production Capacity & MOQ

Airandus uses advanced sheet metal forming machines, including automatic spiral duct formers and CNC plasma cutting systems. They accept customization for non-standard duct sizes and configurations. MOQ and lead time information is available on request.

Certifications

No international certifications are publicly listed. The company focuses on manufacturing capability and product quality rather than certification-based marketing.

Best for: Buyers specifically focused on spiral duct products and associated sheet metal fittings. Their specialization in ductwork makes them a strong option for projects requiring large volumes of standard and custom-size spiral duct.

8. Cooley HVAC — Ningbo Cooley Air-Conditioning Equipment (cooleyhvac.com)

Location: Ningbo, Zhejiang Province.Founded: 1985 (parent company: China-BASE Ningbo Foreign Trade Co.).Employees: 50-100.

Company Profile

Cooley HVAC operates as a division of China-BASE Ningbo Foreign Trade Co., a group company with over 40 years of trading and manufacturing history. This long heritage gives them deep expertise in export compliance, logistics, and North American market requirements. They focus specifically on grilles, registers, and diffusers for the residential and light commercial HVAC market.

Core Products

• Grilles: Return air grilles, supply air grilles, and sidewall grilles.
• Registers: Floor registers, ceiling registers, and baseboard registers in standard US sizes.
• Diffusers: Square and round ceiling diffusers for residential applications.

Production Capacity & MOQ

Smaller manufacturing operation backed by the larger China-BASE trading group's resources. Their North American focus means products are typically manufactured to ANSI/ASHRAE standard sizes and finishes. MOQ starts at 200-500 pieces per model.

Certifications

ISO 9001. The parent company's 40+ year trading heritage provides strong compliance infrastructure for international shipments.

Best for: North American distributors who need residential-grade grilles and registers at competitive pricing, backed by a trading company with established logistics channels to the US market.

9. SuperAir Group (superaircool.com)

Location: Ningbo, Zhejiang Province.Employees: 11-50.

Company Profile

SuperAir positions itself as a one-stop HVAC/R sourcing partner, covering ventilation products, air conditioning parts, and refrigeration accessories. As a smaller, more agile operation, they emphasize personalized service and the ability to source across product categories through their local supplier network. Their unique positioning spans both HVAC and refrigeration, which is useful for buyers who need components from both sectors.

Core Products

• Ventilation accessories: Duct fittings, flexible connectors, and ventilation hardware.
• AC installation parts: Copper fittings, condensate drain components, and mounting brackets.
• Refrigeration accessories: Compressor fittings, refrigerant valves, and system components.

Production Capacity & MOQ

The smaller team (11-50 employees) means SuperAir is best suited for small-to-medium orders or custom sourcing projects. They are more flexible on MOQs than larger factories, making them accessible for startup distributors or buyers testing the Chinese supply chain for the first time.

Certifications

No international certifications publicly listed. Their value proposition is sourcing flexibility rather than manufacturing scale.

Best for: Small-to-medium buyers who need a flexible sourcing partner covering both HVAC and refrigeration parts, particularly those with smaller order volumes or diverse product requirements that don't justify working with multiple large factories.

10. Ningbo Jinrain Air Diffuser Manufactory (air-diffuser.cn)

Location: Ningbo, Zhejiang Province.Founded: 2002.Factory area: 25,000 m².

Company Profile

Ningbo Jinrain is a dedicated air diffuser and grille factory with over two decades of production history. Their 25,000 m² factory in Ningbo gives them significant production capacity focused specifically on air distribution products. As one of the longest-running air diffuser manufacturers in the Ningbo cluster, they have built a steady export business serving European, Middle Eastern, and Southeast Asian markets.

Core Products

• Air diffusers: Square, round, linear, and swirl ceiling diffusers.
• Grilles: Return air grilles, double deflection grilles, and egg crate grilles.
• Volume control dampers: Opposed blade and single blade dampers.
• Accessories: Neck adaptors, plenums, and filter frames.

Production Capacity & MOQ

The 25,000 m² factory provides substantial capacity for large orders. Over 20 years of continuous operation demonstrates manufacturing consistency and supply reliability. MOQ typically starts at 300-500 pieces per model.

Certifications

ISO 9001. Located near Ningbo port for efficient export logistics.

Best for: Buyers who need a reliable, long-established source for air diffusers and grilles with proven production capacity. Not suitable for buyers needing duct products, copper tubing, or installation accessories.

How to Choose the Right Chinese HVAC Manufacturer

After reviewing all 10 manufacturers, use these five decision criteria (ranked by importance) to narrow your shortlist:

1. Product range match. If you need multiple HVAC component types in one shipment (grilles + ducts + dampers + copper + accessories), a one-stop manufacturer like Airwise eliminates the cost and complexity of coordinating multiple suppliers, consolidating shipments, and managing separate QC inspections. If you only need one product category (e.g., only diffusers), a specialist like Ventech or Jinrain may offer deeper selection within that category.

2. Certification compliance. If your projects require UL-listed components (mandatory for many US commercial HVAC installations), your options are extremely limited — only 3 Chinese manufacturers hold UL listing as of 2026. For Australian projects, AWTA certification is non-negotiable. For European work, CE marking is required. Never accept a manufacturer's claim of certification at face value; always verify directly with the certifying body.

3. Order volume and MOQ alignment. Large-volume buyers placing full-container orders can work with any manufacturer on this list. Smaller buyers (partial containers, trial orders, startup distributors) should focus on companies that explicitly accommodate mixed-container or lower-MOQ orders. SuperAir and Cooley tend to be more flexible for smaller initial orders.

4. Delivery speed and local stock. Standard ocean freight from Chinese ports takes 14-30 days depending on destination. If your business requires faster replenishment, manufacturers with overseas warehousing or production facilities provide a critical advantage. Airwise's Houston spiral duct facility can deliver within 5-10 days to US customers, while their Sydney warehouse serves Australia and New Zealand.

5. Communication and sample quality. Before committing to a production order, request samples from your top 2-3 candidates. The sample process itself reveals the manufacturer's responsiveness, dimensional accuracy, finish quality, packaging standards, and English communication competence. These are reliable predictors of the actual production experience. A manufacturer that takes 3 weeks to ship a sample will likely take longer than quoted on production orders too.

Red Flags to Watch For

• Manufacturer refuses to provide factory address or video tour
• Website shows products from multiple unrelated industries (suggests trading company, not factory)
• Claims UL/CE certification but cannot provide certificate copies with verifiable registration numbers
• No export history visible on customs data platforms
• Prices significantly below market average (may indicate substandard materials or bait-and-switch tactics)