Ningbo Sina Air Co., Ltd | Leading Air Diffuser & HVAC Components Manufacturer in China

About Ningbo Sina Air

Ningbo Sina Air Co., Ltd was established in 2018 and is located in Yuyao, Ningbo city — just 2.5 hours from Shanghai Pudong Airport. As a comprehensive manufacturer with an independent export license, we integrate design, R&D, production, and sales into one streamlined operation.

Our facility includes advanced workshops for cutting, punching, bending, welding, powder coating, and plastic injection, ensuring complete control over quality and delivery timelines for every product we manufacture.

2018

Founded

China

Based

Export

Licensed

Full

Production Chain

Our Products

High-performance HVAC components designed for reliability, efficiency, and aesthetic integration in commercial and industrial environments.

Floor Diffuser

Durable floor-mounted air distribution solution with adjustable airflow control for commercial and industrial applications.

Door Linked Eggcrate Grille

Integrated ventilation solution for doors with eggcrate design for optimal airflow and debris protection.

Round Diffuser

Circular ceiling diffuser with symmetrical airflow pattern for even air distribution in offices and public spaces.

Swirl Air Diffuser

High-induction swirl diffuser for superior air mixing and comfort in large-volume spaces.

Metal Air Valve

Robust manual or automatic air control valve made from high-grade metal for precise airflow regulation.

Door Linked Grille with Filter

Ventilation grille with integrated filter for clean air delivery in sensitive environments.

Plastic Air Valve

Lightweight, corrosion-resistant plastic air control valve ideal for humid or chemically aggressive environments.

Round Air Grille

Simple and effective round grille for wall or ceiling mounting with directional airflow control.

Access Door

Insulated access panel for ducts and mechanical enclosures with secure locking mechanism.

Duct Fittings

Customizable duct connectors, elbows, and transitions for seamless HVAC system integration.

Plastic Linear Grille

Modern linear ventilation grille made from durable plastic, ideal for architectural integration.

OBD (Outdoor Air Damper)

Weather-resistant outdoor air intake damper with motorized control for fresh air management.

Why Choose SinaAir?

We combine advanced manufacturing capabilities with strict quality control to deliver HVAC components that meet international standards.

Full Production Chain

From cutting and punching to welding, powder coating, and plastic injection — we control every step.

Export Licensed

Independent export license enables direct global shipments with full documentation compliance.

R&D Capable

Strong research and development team supports custom design and engineering solutions.

Quality Assured

Rigorous quality checks at every stage ensure reliability and performance consistency.

2018

Company Established

China

Manufacturing Base

Global

Export Capability

Frequently Asked Questions

Where is Ningbo Sina Air located?

The company is located at No.422 Changyuan RD, Yangming District, Yuyao, Zhejiang, China — approximately 2.5 hours from Shanghai Pudong Airport.

What products does SinaAir manufacture?

We specialize in air diffusers, grilles (including floor, round, and linear types), air valves (metal and plastic), OBDs, access doors, duct fittings, and custom plastic products.

Does SinaAir have export capabilities?

Yes, Ningbo Sina Air Co., Ltd holds an independent export license, allowing us to ship directly to customers worldwide with full documentation support.

Can SinaAir produce custom designs?

Absolutely. With strong R&D and production capabilities — including plastic injection and metal fabrication — we can develop custom HVAC components based on client specifications.

What materials are used in your products?

We work with various metals (steel, aluminum) for grilles and valves, and multiple engineering plastics for injection-molded components, ensuring durability and corrosion resistance.

Get in Touch

For inquiries, quotes, or technical support, please reach out through the official website.

Phone

0574-22654358

Email

[email protected]

Visit Official Website

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