Demineralization Cartridge Compatible with Dreos HM306 HM311 HM524 HM409S

*This is not a OEM product. The brand names and logos are the registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility.All brand names and model numbers mentioned are for compatibility purposes only. We do not claim affiliation with or endorsement by the original brand owners. Products are manufactured by us and can be customized with your brand.

*Products can be customized, not limited to the ones listed on this website. 

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Nanjing Blue Sky Filter Co.,Ltd. 

Nanjing Blue Sky Filter Co., Ltd. was founded in 2009. Blue Sky manufactures and sells various types of air filters and has expanded the product range to water filtration products, kitchen filtration products, and automotive filtration products etc. The company's products are exported to international markets of 48 countries.

Since its establishment, Nanjing Blue Sky Filter Co., Ltd. has steadily grown and has obtained ISO9001 and ISO14001 certifications. Blue Sky has been recognized as a National High-Tech Enterprise and hold multiple 8patents and quality inspection reports. Blue Sky boasts a modern standardized workshop, advanced production equipment, well-designed production lines, strict quality control, and a management system to ensure that customers receive the best cooperation and service. All true high-efficiency filters are produced in a standardized dust-free workshop. We also have a comprehensive and advanced testing laboratory to ensure the high-quality performance of HEPA filters.

Blue Sky's filtration products are produced with various environmentally friendly materials and advanced production facilities to meet customized specifications and some special requirements. Blue Sky's filtration products strictly adhere to domestic and international standards, such as EN779 and EN1822 etc.

Blue Sky's technical team excels in developing various new filtration products for many appliances and machines, residential, commercial, and industrial applications. 

Blue Sky has a well-trained, highly qualified team of engineers and a sales team dedicated to market and customer service. We provide integrated services to customers worldwide, not only offering mature filtration products but also designing and developing new filtration products for our customers. We are confident that with our production capabilities and experience, we can help customers gain a competitive advantage.

Blue Sky's motto is to be a eco-friendly and sustainable company, providing customers with competitive high-quality filter products, and growing together!

Why Choose Us

1.Integrated Manufacturing and Logistics: Offers comprehensive services from production to shipment.

2.Extensive Product Line: Covers air, water, kitchen, and automotive filtration products.

3.International Quality Certifications: Holds ISO9001, ISO14001 certifications, and multiple patents.

4.Customized Services: Provides customized solutions for special specifications and requirements.

5.Global Service: Products are exported to more than 45 countries and areas, with rich international service experience.

6.Advanced Production Facilities: Standardized dust-free workshops and strict quality control.

7.Continuous Innovation: Constantly developing new products to maintain technological leadership.

8.Professional Team: Well-trained engineers and sales team offering support.

9.Eco-friendly and Sustainable: Committed to using environmentally friendly materials and sustainable development.

10.High Customer Loyalty: Quality products and services earn customer trust.

1.Can the product be customized?

Yes, We are a professional manufacturer that welcomes customization, including raw material selection, specific logo printing, and packaging. Additionally, we can produce items according to your samples or drawings.

2.What can you buy from us?

Vacuum Cleaner Filters, Air Purifier Filters, HVAC Filters, Automotive Filters, Industrial Filters, Humidifier Filters, Cooker Hood Filters, Medical Filters and other filters etc.

3.What kind of service can you get from us?

You can have the following services from our team: Customized Product Solutions (Including the certain designs), Quality Assurance, New product's R&D, Global Logistics per request, After-Sales Support etc.

4. How to pay?

You can pay in various ways, such as T/T , L/C, D/P, Credit Card, Paypal, Payoneer and etc.

5.How long is the delivery time?

The production time depends on the order quantity and product type . Usually, it takes about 30 days to fulfill a 20' container order.

6. How are arrange the shipment?

The shipment to deliver the goods can be arranged by our team according to the customer's request, and the customer can also let his own logisitics agency to do the work.

7.What about the after-sales service?

Our company is truly responsible for the supplied products throughout its warranty period.

Our team of skilled engineers and technical experts is available around the clock to assist you with any questions or issues that may arise, ensuring your complete satisfaction with our products and services.

8.How can the business be long-term and a good relationship?

Our team has been working in the filtering industry for 17 years, and focuses on the following principles to keep the long-term and good relation with the customers:  

Mutual Respect and Trust, Consistent Quality and Reliability, Open and Transparent Communication,

Adaptability and Flexibility, Continuous Improvement, Attentive After-Sales Support and Service.