Product Introduction

The Circular Swirl Diffuser is a high-induction air supply terminal specifically designed for commercial large-space HVAC systems. Manufactured from high-strength aluminum or galvanised steel, it generates a swirling airflow pattern through radially arranged guide vanes, offering high induction rates, rapid air velocity decay, and thorough air mixing. Unlike conventional diffusers, the swirling air stream quickly mixes with room air, achieving draft-free comfort at the occupied zone. Widely used in shopping mall atriums, airport terminals, theaters, sports venues, industrial halls, and other high-ceiling spaces — especially ideal for applications with large temperature differences between cooling and heating.

Applicable Locations

With its high airflow capacity, large temperature differential capability, and draft-free comfort, the Circular Swirl Diffuser is widely used in commercial buildings with large and high spaces. Typical applications include:

Product Advantages

1. High Induction Ratio – Rapid Air Mixing

With radially arranged guide vanes generating a swirling airflow, the diffuser creates a vortex beneath it, inducing room air to mix rapidly with supply air. Its induction ratio reaches 10-20 times that of conventional diffusers, causing velocity and temperature to decay quickly after discharge, delivering gentle and comfortable airflow at the occupied zone.

2. High Capacity & Large Temperature Differential – VAV Compatible

The swirl diffuser handles temperature differentials from -12K to +15K, maintaining stable air distribution in both cooling and heating modes. Even with significant airflow variations, the discharge pattern remains stable — making it particularly suitable for VAV systems. The high airflow capacity also reduces the number of terminals required.

3. Adjustable Air Pattern – Summer and Winter Versatility

Air direction can be adjusted by changing the guide vane orientation. Manual type: on-site adjustment as needed. Electric actuator type: remote central control. Thermal control type: built-in temperature sensor automatically adjusts the blade angle — horizontal discharge for cooling mode (supply air ≤17°C) and vertical discharge for heating mode (supply air ≥27°C), requiring no manual intervention or power supply. Ideal for spaces >3.8m in height, with vertical throw up to 20 meters.

4. Low Noise Operation – Suitable for High-Requirement Spaces

Optimised aerodynamic design ensures low noise levels even at high airflow rates, making it ideal for theaters, concert halls, hospital waiting areas, and other noise-sensitive environments.

5. Aluminum Construction – Aesthetic and Durable

Manufactured from high-strength aluminum or galvanised steel with powder-coated finish (standard RAL9010/9016 or custom colours). The clean circular design complements various ceiling styles while providing corrosion resistance for long-term use.

Technical Specifications

Working Principle & Selection Recommendations

Selection Recommendations:

About Us:
  Guangzhou Xingjin Fire Equipment Co., Ltd. is a professional enterprise dedicated to the research, development and production of HFC-227ea (FM200), Novec1230, CO2 and inert gas products. For many years, the company has been committed to improving product quality, enriching product varieties and optimizing product specifications.
  At present, our company's popular FM200 products are widely used, such as: pipe network FM200 fire extinguishing system, cabinet FM200 fire extinguishing system, automatic FM200 fire extinguisher (ceiling type), fire detection tube fire extinguishing system, and automatic fire extinguishing pipe. In addition, our inert gas fire extinguishing systems are also becoming increasingly popular, such as the IG541 (nitrogen) fire extinguishing system, IG100 (nitrogen) fire extinguishing system, and IG55 (argon) fire extinguishing system. Due to our high-quality products and services as well as our good reputation, our company is highly praised by customers all over the world.

Our factory:
  The factory is divided into multiple areas, mainly used for the production of gas cylinders, gas filling, product inspection, goods packaging, storage of goods, sample display, etc. We have our own professional production and testing equipment, such as bottle washing machines, dryers, valve loaders, gas filling machines, etc

Our products:
  HFC-227ea (FM200), Novec1230, CO2 and inert gas series products (such as pipe network, suspended, external pressure storage, cabinet, integrated cabinet, fire detection pipe, portable fire extinguisher, gas cylinder), fire extinguishing pipe, complete alarm system, foam fire extinguishing series (such as vertical/horizontal foam tank, foam agent, filling machine, fire cannon), hot aerosol and other fire extinguishing equipment .

Our services:
   We have a professional and mature team, including a solution design team, a skilled installation team, a quality inspection team and an after-sales service team.
 

Our honors:
   Since its establishment in 2010, the company has won numerous praises and honors. In 2014, it was awarded the title of "AA-level Credit Company" by the China Fire Protection Association. In addition, all of our products have passed the CCC test and have relevant certificates for each product.
 

The main market:
  Our target customers are people all over the world who need fire-fighting equipment. So far, we have rapidly developed the market in Southeast Asia, the Middle East and Africa, and have received high praise from a wide range of customers. In the coming years, we will strive to explore other foreign markets.

We are ready for challenges, so please do not hesitate to send an inquiry to us!