Customers' preferences for Air21xx's HVLS (High Volume Low Speed) fans may be reflected in the following aspects:

1. Technological Innovation: Air21xx's continuous innovation in the core technology of HVLS fans, such as the use of advanced Permanent Magnet Synchronous Motor (PMSM) technology, attracts customers who pursue high performance and efficiency.

2. Energy Efficiency: Customers prefer Air21xx HVLS fans for their high energy efficiency ratio, as they provide strong airflow while consuming relatively low energy, which helps to reduce long-term operational costs.

3. Ease of Installation and Operation: Air21xx's HVLS fan designs focus on user experience, simplifying the installation process and providing easy-to-operate control systems, meeting customers' demands for convenience.

4. Safety Features: Safety is an important consideration for customers when choosing HVLS fans, and Air21xx's safety design, such as dual safety protection, enhances customer trust.

5. Customized Solutions: Air21xx's ability to provide customized HVLS fan solutions for specific customer needs offers flexibility and personalized services that are often favored by customers.

6. Brand Reputation: As a well-known brand in the industry, Air21xx's brand influence and market recognition are also important factors for customers choosing its products.

7. Globalized Services: Air21xx's global after-sales service and support network ensure that multinational companies and international projects can obtain a consistent service experience.

8. Environmental Adaptability: Air21xx HVLS fans can adapt to various working environments, including indoor and outdoor, humid or dry climate conditions, meeting the needs of customers in different regions.

9. Intelligent Features: With the development of intelligent technology, Air21xx HVLS fans' smart control functions, such as remote monitoring and automatic adjustment, are also favored by customers who are pursuing modernization and intelligent systems.

10. Low Maintenance Costs: Due to the durability and reliability design of Air21xx HVLS fans, their maintenance costs are low, which is an attractive point for customers who wish to reduce maintenance expenses.

11. Sustainability: Air21xx focuses on environmental protection and sustainability in product design and manufacturing, aligning with the increasing customer demand for green and eco-friendly products.

12. Market Positioning: Air21xx's clear market positioning of HVLS fans, meeting the needs of different market segments such as industrial, commercial, and agricultural, also wins customer favor.

Customers' preferences for Air21xx's HVLS fans are multifaceted, covering technology, performance, safety, customized services, brand reputation, intelligence, and other aspects.